Quantum Computing Report
Industry
Apr 07, 2026
Quantum Secure Encryption Corp. (QSE) has announced the official launch of QPA v2, an enterprise-grade platform designed to automate and manage the migration to post-quantum cryptography (PQC). The release signifies a transition within the cybersecur…
Quantum Computing Report
Industry
Apr 07, 2026
IQM Quantum Computers has entered into a commercial agreement with Galaxy Systemy Informatyczne for the on-premises delivery of an IQM Radiance 54-qubit system. Scheduled for installation at Galaxy’s data center in Zielona Góra, Poland, in the fourth…
The Quantum Insider
News
Apr 07, 2026
Insider Brief PRESS RELEASE — UK-based quantum technology company Moth has announced two senior hires as it expands its operations in the United States, marking a significant step in its mission to make quantum computing accessible to businesses and …
The Quantum Insider
News
Apr 07, 2026
Insider Brief Quantum computing is shifting from a theoretical pursuit to a strategic priority for the energy sector as rising demand for compute power reshapes infrastructure, policy and investment decisions, according to a new report from S&P Globa…
The Quantum Insider
News
Apr 07, 2026
Insider Brief PRESS RELEASE — IQM Quantum Computers, a global leader in superconducting quantum computing, today announced a commercial milestone to deploy a hybrid integrated quantum computer at Galaxy Systemy Informatyczne Sp. z o.o., marking its f…
The Quantum Insider
News
Apr 07, 2026
Insider Brief PRESS RELEASE — Delft Circuits today announces the appointment of Karen Keenan as Chief Operating Officer (COO), marking a key step in scaling the company into a global quantum I/O hardware manufacturing platform. Karen succeeds Maarten…
Phys.org
Research
Apr 07, 2026
Mid-circuit measurements are one of the biggest practical hurdles in quantum error correction on encoded qubits. Researchers in Innsbruck and Aachen have now proposed and experimentally demonstrated that a universal fault-tolerant quantum algorithm c…
The Quantum Insider
News
Apr 07, 2026
Insider Brief PRESS RELEASE — BTQ Technologies Corp. (“BTQ” or the “Company”) (Nasdaq: BTQ) (CBOE CA: BTQ), a global quantum technology company focused on securing mission-critical networks, today announced the publication of a landmark research pape…
The Quantum Insider
News
Apr 07, 2026
Insider Brief PRESS RELEASE — In August 2024, the National Institute of Standards and Technology finalized the first three post-quantum cryptography standards — FIPS 203, 204, and 205 — after an eight-year global evaluation process. In January 2027, …
The Quantum Insider
News
Apr 07, 2026
Insider Brief PRESS RELEASE — Quantum computers are often described as the supercharged engines of the future — machines capable of solving certain problems that are classically intractable for today’s most powerful computers. But there’s a catch: ev…
The Quantum Insider
News
Apr 07, 2026
Insider Brief Solana’s push toward quantum-resistant security could sharply reduce its transaction speeds, highlighting a growing trade-off between future-proofing crypto networks and maintaining performance. Solana has built its reputation on speed,…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03346v1 Announce Type: new Abstract: Partial differential equations (PDEs) play a crucial role in financial mathematics, particularly in portfolio optimization, and solving them using classical numerical or neural network methods has alway…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03360v1 Announce Type: new Abstract: Dynamic quantum circuits with mid-circuit measurements (MCMs) and feed-forward operations play a crucial role in various applications, such as quantum error correction and quantum algorithms. With advan…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03373v1 Announce Type: new Abstract: We present an approach for entangling spin qubits via capacitive coupling mediated by an ac electric field-driven multielectron mediator quantum dot. To illustrate this method, we consider the case of a…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03435v1 Announce Type: new Abstract: We investigate high frequency motional states of trapped atomic ions. Trapped ions in rf traps are confined by an approximate harmonic potential and exhibit quantum motional states that mediate essentia…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03445v1 Announce Type: new Abstract: Hybrid quantum-classical applications pose significant resource management challenges due to heterogeneity and dynamism in both infrastructure and workloads. Quantum-HPC environments integrate quantum p…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03469v1 Announce Type: new Abstract: Reservoir computing promises a fast method for handling large amounts of temporal data. This hinges on constructing a good reservoir--a dynamical system capable of transforming inputs into a high-dimens…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03482v1 Announce Type: new Abstract: High-gain spontaneous parametric down-conversion (SPDC) produces bright squeezed vacuum with rich high-dimensional entanglement, but its output is inherently multimodal and non-perturbative, making the …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03495v1 Announce Type: new Abstract: A single photon in a superposition of $d$ modes naturally encode a $d$-dimensional quantum system, a so-called qudit. We show that such superpositions can be leveraged to achieve a quantum speed-up of r…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03546v1 Announce Type: new Abstract: Quantum annealing is a quantum algorithm to solve combinatorial optimization problems. In the current quantum annealing devices, the dynamic range of the input Ising Hamiltonian, defined as the ratio of…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03550v1 Announce Type: new Abstract: Monitored quantum circuits host a rich variety of exotic non-equilibrium phases. Among the most representative examples are measurement-induced phase transitions between distinct area-law entangled stat…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03576v1 Announce Type: new Abstract: Subradiance, a hallmark cooperative phenomenon in waveguide QED, is characterized by a universal power-law scaling of decay rates with system size and underpins many applications in quantum information …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03577v1 Announce Type: new Abstract: High-dimensional quantum systems greatly outperform their two-dimensional counterparts in channel capacity, quantum complexity and efficiency, quantum communication security, etc. Bell-state analyzer (B…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03593v1 Announce Type: new Abstract: We study a discrete-time quantum walk in presence of a detector at $x_D$ initially. The detector here is repeatedly removed after a span of $t_R$, the removal time, and reinserted at random locations. T…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03633v1 Announce Type: new Abstract: Black hole spacetimes provide a natural setting for quantum systems in curved spacetime, where effects such as Hawking radiation arise from event horizons. In this work, we investigate the impact of the…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03662v1 Announce Type: new Abstract: We present a unified quantum-mechanical derivation of the Wallis formula from two solvable radial systems: the circular states of the three-dimensional isotropic harmonic oscillator and the lowest-radia…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03725v1 Announce Type: new Abstract: We extend the algebraic diversity (AD) framework from classical signal processing to quantum measurement theory. The central result -- the Quantum Algebraic Diversity (QAD) Theorem -- establishes that a…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03726v1 Announce Type: new Abstract: High-fidelity quantum operations require the system dynamics to be strictly confined to the computational subspace. In practice, however, control fields inevitably couple to leakage levels, giving rise …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03731v1 Announce Type: new Abstract: Finding the ground state of complex quantum systems remains a central challenge in many-body physics, quantum chemistry, and combinatorial optimization, due to the exponential growth of the Hilbert-spac…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03744v1 Announce Type: new Abstract: Quantum entanglement plays a fundamental role in quantum cryptography and computation. An important example of quantum entanglement can be found in the correlations of Einstein, Podolsky, and Rosen (EPR…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03816v1 Announce Type: new Abstract: Classical simulation of quantum circuits remains indispensable for algorithm development, hardware validation, and error analysis in the noisy intermediate-scale quantum (NISQ) era. However, state-vecto…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03884v1 Announce Type: new Abstract: Violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality certifies genuine quantum correlations. In this work, we formalize in Lean 4 the rigidity theorem -- any strategy achieving near-optimal CHS…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03951v1 Announce Type: new Abstract: In superconducting quantum circuits, decoherence improvements are frequently obtained through process interventions that simultaneously modify surface chemistry, microstructural topology, and device geo…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03990v1 Announce Type: new Abstract: Entropic uncertainty relations provide an information-theoretic framework for quantifying the fundamental indeterminacy inherent in quantum mechanics. We propose more stringent quantum-memory-assisted e…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04046v1 Announce Type: new Abstract: We introduce the notion of dismagicker: non-Clifford unitary gate designed to reduce the non-stabilizerness (also called magic) of quantum many-body states. Although both entanglement and non-stabilizer…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04137v1 Announce Type: new Abstract: We find that reinforcement exponentially reduces computation time of the quantum search problem from $\sqrt{D}$ to $\ln D$ in a $D$-dimensional system. Therefor, a reinforced quantum search is expected …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04143v1 Announce Type: new Abstract: The development of quantum networks (QNs) relies on efficient mechanisms for distributing entanglement among multiple quantum users (QUs) under practical system constraints. This paper investigates the …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04164v1 Announce Type: new Abstract: Mutually Unbiased Bases (MUBs) constitute a fundamental geometric structure in quantum theory, known for providing an optimal measurement scheme for quantum state tomography. In prime and prime-power di…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04205v1 Announce Type: new Abstract: Unitary $k$-designs are central to quantum information and quantum many-body physics as efficient proxies for Haar-random dynamics. We study how chaotic Hamiltonian evolution can generate unitary $k$-de…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04292v1 Announce Type: new Abstract: Parametrised quantum circuits are a central framework for near term quantum machine learning. However, it remains challenging to determine in advance how architectural choices, such as encoding strategi…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04298v1 Announce Type: new Abstract: Beyond ground state energy estimation, quantum phase estimation (QPE) applied to many-electron systems has the potential to output a projection on the ground state, that would enable the evaluation of o…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04375v1 Announce Type: new Abstract: A common view in monitored quantum dynamics is that local measurements suppress entanglement growth. We show that this intuition can fail in a one-dimensional spinful fermionic chain governed by a BCS H…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04437v1 Announce Type: new Abstract: Quantum clock synchronization (QCS) aims to establish a shared temporal reference between distant nodes by exploiting uniquely quantum phenomena such as entanglement, single-photon interference, and qua…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04438v1 Announce Type: new Abstract: Quantum simulation and computing traditionally has been based on two main paradigms, namely, digital and analog. In the digital paradigm, usually single and two-qubit gates (where qubit is an acronym fo…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04454v1 Announce Type: new Abstract: Characterizing quantum states is essential for validating quantum devices, yet conventional quantum state tomography becomes prohibitively expensive as system size grows. Direct tomography offers a dist…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04462v1 Announce Type: new Abstract: This thesis develops a decision-theoretic framework for extracting thermodynamic work from temporal correlations in quantum systems. We model a classical agent -- lacking quantum memory -- performing ad…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04570v1 Announce Type: new Abstract: We formulate a global-position colored-permutation encoding for the capacitated vehicle routing problem. Each of the $K$ vehicles selects a disjoint partial permutation, and the sum of these $K$ color l…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04600v1 Announce Type: new Abstract: Assembling large-scale, defect-free Rydberg atom arrays is a key technology for neutral-atom quantum computation. Dynamic holographic optical tweezers enable the assembly and reconfiguration of such arr…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04685v1 Announce Type: new Abstract: We propose a quantum measurement-based framework for probabilistic transformation of grayscale images using adaptive positive operator-valued measures (POVMs). In contrast, to existing approaches that a…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04691v1 Announce Type: new Abstract: The phenomenon of interaction-free measurement (IFM) enables the probabilistic detection of an absorbing object with reduced photon absorption. We report the experimental implementation of a simultaneou…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04699v1 Announce Type: new Abstract: Theories of the measured homodyne current generated by a stochastic Schr\"odinger equation (SSE) can be tested in a simulation of the Einstein-Podolsky-Rosen (EPR) correlations for a two-mode squeezed s…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04761v1 Announce Type: new Abstract: The phrase ``buy a quantum computer'' hides several different procurement problems. An institution may be seeking cloud access for teaching, reserved capacity for research, a local instrument for hardwa…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04786v1 Announce Type: new Abstract: This paper presents a quantum search approach to combinatorial constraint satisfaction problems, demonstrated through the generation of magic squares. We reformulate magic square construction as a quant…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04789v1 Announce Type: new Abstract: PulsePol is an elegantly designed pulse-sequence-based quantum control scheme that enables polarization transfer between electron and nuclear spins, for example, in nitrogen-vacancy (NV) centers. Howeve…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04816v1 Announce Type: new Abstract: Contextuality and nonlocality are distinct manifestations at the foundation of quantum mechanics, yet their coexistence within a single quantum state remains subtle. In a hybrid CHSH--KCBS scenario invo…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04828v1 Announce Type: new Abstract: Data-driven surrogates can replace expensive multiphysics solvers for parametric PDEs, yet building compact, accurate neural operators for three-dimensional problems remains challenging: in Fourier Neur…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04873v1 Announce Type: new Abstract: Quantum coherence provides a controllable thermodynamic resource that can raise or lower the effective temperature of a cavity mode, enabling efficiency tuning in quantum heat engines. Here, we derive a…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04888v1 Announce Type: new Abstract: Recently, Yamaguchi and Kempf [Phys. Rev. Lett. 136:010801, arXiv:2501.02757] proved that encrypted qubits can be cloned. In this work, we generalize the encrypted cloning protocol and prove that it als…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04899v1 Announce Type: new Abstract: Contextuality and measurement incompatibility are two fundamental aspects of nonclassicality, and their manifestations in observed quantum correlations are often deeply interconnected. Recently, measure…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03288v1 Announce Type: cross Abstract: Damage in infrastructure is often hidden until it becomes costly or dangerous. Common examples include corrosion under insulation, early fatigue damage in steel, corrosion of embedded reinforcement, a…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03294v1 Announce Type: cross Abstract: Neural quantum states are powerful variational wavefunctions, but it remains unclear which many-body states can be represented efficiently by modern additive architectures. We introduce Walsh complexi…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03423v1 Announce Type: cross Abstract: The ultrafast nonlinear optical response of molecular ensembles is fundamentally altered under strong light-matter coupling. To rigorously isolate the genuine many-body contributions, an exact time-do…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03441v1 Announce Type: cross Abstract: Coherent interfaces between microwave-frequency quantum systems and low-loss optical links are essential for quantum networks. However, existing microwave-optical transducers often trade conversion ef…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03569v1 Announce Type: cross Abstract: Literature provides several bounds for quantum local recovery, which essentially consider the number of message qudits, the distance, the length, and the locality of the involved codes. We give a fami…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03669v1 Announce Type: cross Abstract: The statistics of gaps between quantum energy levels is a hallmark criterion in quantum chaos and quantum integrability studies. The relevant distributions corresponding to exactly integrable vs. full…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03700v1 Announce Type: cross Abstract: The CHSH mod 3 Bell inequality is a natural testbed for higher-dimensional quantum nonlocality, yet its maximal quantum violation and self-testing properties have remained unresolved. We determine its…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03729v1 Announce Type: cross Abstract: We investigate whether commutativity is necessary to represent relativistic locality for localization observables of relativistic quantum systems in Minkowski spacetime. A well known no-go theorem by …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03757v1 Announce Type: cross Abstract: The year 2025 had been designated by UNESCO as the International Year of Quantum Science and Technology. 125 years ago Max Planck's discovery of radiation quanta started the quantum era and 100 years …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03822v1 Announce Type: cross Abstract: We study the gravitational production of spectator massless vector particles in a single-field inflationary scenario, and the related entanglement generation across the Hubble horizon. Accordingly, we…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.03960v1 Announce Type: cross Abstract: Tensor network methods, particularly those based on Matrix Product States (MPS), provide a powerful framework for simulating quantum many-body systems. A persistent computational challenge in these me…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04128v1 Announce Type: cross Abstract: We formulate Lagrangian descriptors (LDs) in the path integral framework. Averaging the classical LD over fluctuations about extremal trajectories defines a quantum LD that incorporates quantum effect…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04173v1 Announce Type: cross Abstract: This paper completes a previous work by constructing a class of positive-energy relativistic spatial localization observables in Minkowski spacetime within quantum field theory, using the stress-energ…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04414v1 Announce Type: cross Abstract: Quantum machine learning (QML) stands at the intersection of quantum computing and artificial intelligence, offering the potential to solve problems that remain intractable for classical methods. Howe…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04596v1 Announce Type: cross Abstract: We present a systematic numerical investigation of the "entanglement geometry gravity" chain in random tensor networks (RTN) established by the ER EPR conjecture and Jacobson's thermodynamic derivatio…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04606v1 Announce Type: cross Abstract: Combinatorial optimization problems become computationally intractable as these NP-hard problems scale. We previously proposed extraction-type majority voting logic (E-MVL), a quantum-inspired algorit…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04778v1 Announce Type: cross Abstract: We present QCommute, a software tool implemented in C++ for symbolic computation of nested commutators between a Hamiltonian and local observables in quantum many-body spin-1/2 systems on one-, two-, …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04784v1 Announce Type: cross Abstract: We establish fundamental uncertainty relations for the hydrodynamic variables arising from the Madelung representation of quantum fields in curved spacetime. Through canonical quantization of the dens…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04837v1 Announce Type: cross Abstract: Simulating lattice gauge theories on quantum computers presents unique challenges that drive the development of novel theoretical frameworks. The orbifold lattice approach offers a scalable method for…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.04879v1 Announce Type: cross Abstract: The Boltzmann-Loschmidt dispute of 1876 questioned the possibility of a statistical irreversible description by time reversible classical equations of motion of atoms. Here we show analytically and nu…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2301.09274v2 Announce Type: replace Abstract: It is well-known that quantum mechanics admits two distinct evolutions: the unitary evolution, which is deterministic and well described by the Schr\"{o}dinger equation, and the collapse of the wave…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2309.07245v3 Announce Type: replace Abstract: A question raised by Freedman & Hastings (2023) still stands: To produce a mathematical theory that would unify quantum entanglement/tensor-structure with parameterized/bundle-structure via their am…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2401.11258v2 Announce Type: replace Abstract: Prototype-based clustering algorithms such as k-means are sensitive to the selection of initial cluster centroids, with poor initialization leading to slower convergence and suboptimal solutions tra…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2406.01699v3 Announce Type: replace Abstract: The doubly minimized Petz Renyi mutual information of order $\alpha$ is defined as the minimization of the Petz divergence of order $\alpha$ of a fixed bipartite quantum state relative to any produc…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2406.03213v3 Announce Type: replace Abstract: The doubly minimized Petz Renyi mutual information of order $\alpha$ is defined as the minimum of the Petz divergence of order $\alpha$ of a given bipartite quantum state relative to all product sta…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2407.09710v5 Announce Type: replace Abstract: The next generation of distributed quantum processors combines single-location quantum computing and quantum networking techniques to permit large entangled qubit groups to be established through re…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2502.05621v2 Announce Type: replace Abstract: We present a five-module pedagogical framework for teaching physics-informed machine learning (ML) through two progressively complex physical systems: a driven, damped nonlinear pendulum and a one-d…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2504.00162v2 Announce Type: replace Abstract: We investigate prepare-and-measure scenarios in which a sender and a receiver use entanglement to send quantum information over a channel with limited capacity. We formalise this framework, identify…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2504.07800v2 Announce Type: replace Abstract: Quantum error correction codes defined on hyperbolic lattices leverage the unique geometric properties of the hyperbolic space to enhance the performance of quantum error correction. By embedding qu…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2504.11737v2 Announce Type: replace Abstract: Developing scalable, fault-tolerant atomic quantum processors requires precise control over large arrays of optical beams. This remains a major challenge due to inherent imperfections in classical c…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2506.01882v2 Announce Type: replace Abstract: The characterization of Hamiltonians and other components of open quantum dynamical systems plays a crucial role in quantum computing and other applications. Scientific machine learning techniques h…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2506.14075v2 Announce Type: replace Abstract: The development of complex circuits for practical applications in the current quantum computing ecosystem is based on basic primitives such as Bell states, which provide superposition, entanglement,…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2506.20730v3 Announce Type: replace Abstract: Engineering effective Hamiltonians is essential for advancing quantum technologies including quantum simulation, sensing, and computing. This paper presents a general framework for effective Hamilto…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2508.10106v2 Announce Type: replace Abstract: We summarize the key ingredients required for universal topological quantum computation using Majorana zero modes in networks of topological superconductor nanowires. Particular emphasis is placed o…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2508.11175v3 Announce Type: replace Abstract: Quantum Reservoir Computing (QRC) uses quantum dynamics to efficiently process temporal data. In this work, we investigate a QRC framework based on two coupled Kerr nonlinear oscillators, a system w…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2508.13734v2 Announce Type: replace Abstract: Genuine multipartite entanglement is arguably the most valuable form of entanglement in the multipartite case, with applications, for instance, in quantum metrology. In order to detect that form of …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2508.14822v3 Announce Type: replace Abstract: This article explores an operational model for transition amplitudes between measurements proposed by Goyal et al. within the quantum reconstruction program. To classify suitable amplitude algebras,…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2508.16335v3 Announce Type: replace Abstract: Negatively charged nitrogen-vacancy (NV) centers and other color centers in diamonds have emerged as promising platforms for quantum communication, quantum information processing, and nanoscale sens…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2508.21667v3 Announce Type: replace Abstract: Block encoding of sparse matrices underpins powerful quantum algorithms such as quantum singular value transformation, Hamiltonian simulation, and quantum linear solvers, yet its efficient gate-leve…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2509.01858v3 Announce Type: replace Abstract: We propose and analyze an all-mechanical route to coherent control and quantum-state reconstruction of the fundamental flexural mode of a suspended carbon nanotube (CNT) operated in the anharmonic (…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2509.15951v2 Announce Type: replace Abstract: Quantum Anonymous Veto (QAV) protocols enable secure and anonymous decision-making by allowing participants to detect the presence of a veto without revealing individual choices. While existing QAV …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2509.25985v3 Announce Type: replace Abstract: Recently, proposals for realizing a nonreciprocal superradiant quantum phase transition (SQPT) have been put forward, based on either nonreciprocal interactions between two spin ensembles or the Sag…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2510.00168v2 Announce Type: replace Abstract: We study the problem of efficiently learning an unknown $n$-qubit unitary channel in diamond distance given query access. We present a general framework showing that if Pauli operators remain low-co…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2510.08416v3 Announce Type: replace Abstract: Erasure qubits -- qubits designed to have an error profile that is dominated by detectable leakage errors -- are a promising way to cut down the resources needed for quantum error correction. There …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2510.17659v3 Announce Type: replace Abstract: Quantum key distribution (QKD) is a cryptographic technique that uses quantum mechanical principles to enable secure key exchange. Practical deployment of QKD requires robust, cost-effective systems…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2510.19062v2 Announce Type: replace Abstract: We present a quantum algorithm for simulating rovibrational Hamiltonians on fault-tolerant quantum computers. The method integrates exact curvilinear kinetic energy operators and general-form potent…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2510.20728v3 Announce Type: replace Abstract: Exact scientific discovery requires more than heuristic search: candidate constructions must be turned into exact objects and checked independently. We address this gap by extending TeXRA with an in…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2511.12313v2 Announce Type: replace Abstract: The scalability of current quantum networks is limited due to noisy quantum components and high implementation costs, thereby limiting the security advantages that quantum networks provide over thei…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2511.13774v3 Announce Type: replace Abstract: Amplitude damping fundamentally limits qubit lifetimes by irreversibly leaking energy and information into the environment. Standard Wiseman--Milburn feedback offers only modest improvement because …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2512.03341v3 Announce Type: replace Abstract: We investigate quench dynamics in the quantum $S=1/2$ XXZ antiferromagnetic chain with staggered and anisotropic interactions in the flat-band limit. Our quench protocol interchanges the odd- and ev…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2512.04155v2 Announce Type: replace Abstract: Exactly solvable dissipative models provide an analytical tool for studying the relaxation dynamics in open quantum systems. In this work, we study an exactly solvable model based on an anisotropic …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2512.07902v2 Announce Type: replace Abstract: We revisit the Pauli-Clifford connection to introduce a real, grade-preserving algebraic framework for $n$-qubit quantum computation based on the tensor product $C\ell_{2,0}(\mathbb{R})^{\otimes n}$…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2512.14004v2 Announce Type: replace Abstract: Optically-active solid-state systems such as self-assembled quantum dots, rare-earth ions, and color centers in diamond and SiC are promising candidates for quantum network, computing, and sensing a…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2512.19051v5 Announce Type: replace Abstract: We re-analyze a recent experiment by Sharoglazova et al. highlighting the role of the transient regime. We prove that in the evanescent state of the stationary regime their experimental data can be …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2601.07824v3 Announce Type: replace Abstract: Non-stabilizerness, also known as ``magic,'' quantifies how far a quantum state departs from the stabilizer set. It is a central resource behind quantum advantage and a useful probe of the complexit…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2601.10206v2 Announce Type: replace Abstract: We analyze quantum state preservation in open quantum systems using quantum error-correcting (QEC) codes explicitly embedded in microscopic system-bath models. Rather than assuming abstract quantum …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2601.20167v2 Announce Type: replace Abstract: Contextuality is a central feature distinguishing quantum from classical probability theories, but its operational meaning is often stated only qualitatively. In this Letter, we study a simple infor…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.00401v3 Announce Type: replace Abstract: Randomness is intrinsic to quantum mechanics; the outcome of a measurement on a quantum state is a random variable. This feature has been applied to randomness certification, where one party must de…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.01060v2 Announce Type: replace Abstract: The current state, emerging trends, and practical challenges of optical fiber-based power network SCADA quantum communication must be addressed to fully utilize the technological platform's potentia…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.04156v2 Announce Type: replace Abstract: Atom loss is a major error source in neutral-atom quantum computers, accounting for over 40% of the total physical errors in recent experiments. Its nonlinear and correlated nature poses significant…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.04493v3 Announce Type: replace Abstract: We introduce an improved one-shot characterisation of randomness extraction against quantum side information (privacy amplification), strengthening known one-shot bounds and providing a unified deri…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.09645v3 Announce Type: replace Abstract: Photonic Quantum Machine Learning (PQML) is an emerging method to implement scalable, energy-efficient quantum information processing by combining photonic quantum computing technologies with machin…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.14123v2 Announce Type: replace Abstract: We characterize single-mode vacuum squeezing generated by a SNAIL Parametric Amplifier (SPA) operated under conditions representative of practical sensing and qubit-readout experiments. Motivated by…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.15587v3 Announce Type: replace Abstract: The rich dynamics and large Hilbert space of quantum harmonic oscillators make them natural candidates for hardware-efficient and error-correctable quantum information processing. However, implement…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.15610v2 Announce Type: replace Abstract: Code-switching offers a route to universal, fault-tolerant quantum computation by circumventing the limitation implied by the Eastin-Knill theorem against a universal transversal gate set within a s…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.25774v3 Announce Type: replace Abstract: We introduce Catalytic Quantum Error Correction (CQEC), a state recovery protocol exploiting catalytic covariant transformations. CQEC recovers a known target state from noisy copies without an erro…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.26819v2 Announce Type: replace Abstract: We present a protocol for actively suppressing Gauss law violations in quantum simulations of SU(2) lattice gauge theory. The protocol uses mid-circuit measurements to extract a characterization of …
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.26826v2 Announce Type: replace Abstract: A generalized formulation of non-relativistic quantum mechanics is developed within multidimensional geometric (NG) frameworks characterized by a power-law dispersion relation \(E \propto |p|^{j}\),…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.28509v2 Announce Type: replace Abstract: We propose concrete protocols to realize quantum criticality due to excited-state quantum phase transitions (ESQPTs) experimentally in presumably the simplest and most resilient system involving a s…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2604.02064v2 Announce Type: replace Abstract: We provide here a universal approximation theorem with precise quantitative error bounds for noisy quantum neural networks. We focus on applications to Quantitative Finance, where target functions a…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2412.04345v3 Announce Type: replace-cross Abstract: The concept of a particle is ambiguous in quantum field theory. It is generally agreed that particles depend not only on spacetime, but also on coordinates used to parametrise spacetime points…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2503.19572v4 Announce Type: replace-cross Abstract: We study classical and quantum spin models derived from one-dimensional cellular automata (CA) with nonlinear update rules, focusing on rules 30, 54 and 201. We argue that the classical models…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2506.00265v4 Announce Type: replace-cross Abstract: The observable spacetime can be viewed as worldline coincidences (events) between a particle system and the observers of an extended (material) reference frame (ERF). Particle positions are th…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2508.00077v2 Announce Type: replace-cross Abstract: Understanding the stability of integrability in many-body quantum systems is key to controlling dynamics and predicting thermalization. While the breakdown of integrability in short-range inte…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2509.10876v2 Announce Type: replace-cross Abstract: We compute the degeneracy of energy levels in the Kitaev quantum double model for any discrete group $G$ on any planar graph forming the skeleton of a closed orientable surface of arbitrary ge…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2509.12127v3 Announce Type: replace-cross Abstract: This is the manual of the first version of QEDtool, an object-oriented Python package that performs numerical quantum electrodynamics calculations, with focus on full state reconstruction in t…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2511.02618v2 Announce Type: replace-cross Abstract: We study the quantum relaxation dynamics for a lattice version of the one-dimensional (1D) $N$-flavor Gross-Neveu (GN) model after a Hamiltonian parameter quench. Allowing for a system-reservo…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2512.14885v2 Announce Type: replace-cross Abstract: We present a spectroscopic investigation of $^{169}\mathrm{Tm}^+$ that provides two key foundations for its use as a platform for advanced quantum applications. First, we establish the complet…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2512.16667v3 Announce Type: replace-cross Abstract: Non-relativistic quantum particles in the Earth's gravitational field are successfully described by the Schr\"{o}dinger equation with Newton's gravitational potential. Particularly, quantum me…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2601.00860v2 Announce Type: replace-cross Abstract: Can purely mechanical systems generate intelligent language? We prove that dissipative quantum dynamics with analytically tractable non-local context aggregation produce coherent text generati…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2601.20924v2 Announce Type: replace-cross Abstract: Quantifying how much a quantum state breaks a symmetry is essential for characterizing phases, nonequilibrium dynamics, and open-system behavior. Quantum resource theory provides a rigorous op…
arXiv Quantum Physics
Research
Apr 07, 2026
arXiv:2603.27826v2 Announce Type: replace-cross Abstract: Frustrated magnets host emergent magnetic monopoles whose confinement and ordering are governed by two experimental handles that existing platforms cannot vary independently. We realize a bila…
Phys.org
Research
Apr 06, 2026
Most people think of diamonds as high-end adornments. Not Ania Bleszynski Jayich. The UC Santa Barbara physicist sees diamonds, which she grows in the UC Quantum Foundry, as a potentially powerful foundation for quantum sensors. Sensors are currently…
Quantum Computing Report
Industry
Apr 06, 2026
Yuval Boger interviews mathematician Gil Kalai about his long-standing skepticism regarding scalable quantum computing. Kalai explains two main arguments behind his theory: correlated noise that may defeat quantum error correction and complexity-base…
Phys.org
Research
Apr 06, 2026
Quantum mechanics tells us that a particle can never be perfectly still. But how precisely can it be oriented? A research team at the University of Vienna, together with colleagues at TU Wien and Ulm University, has now cooled the rotational motion o…
Phys.org
Research
Apr 06, 2026
The electrons that power our society flow left and right through the circuitry in our electronics, back and forth along the transmission lines that make up our power grid, and up and down to light up every floor of every building. But the electrons i…
Quantum Computing Report
Industry
Apr 06, 2026
Q-Factor, a Tel Aviv-based quantum hardware startup, has exited stealth with $24 million (USD) in seed funding to develop a million-qubit neutral atom quantum computer. The investment round was led by NFX and TPY Capital, with significant participati…
Quantum Computing Report
Industry
Apr 05, 2026
IQM Quantum Computers, in collaboration with Fraunhofer FOKUS, has announced a major update to the Eclipse Qrisp framework, achieving the first full gate-level compilation of Shor’s algorithm at a cryptographically relevant scale of 2048-bit keys. Wh…
Quantum Computing Report
Industry
Apr 05, 2026
Dr. Dominic Williamson (University of Sydney) and Theodore J. Yoder (IBM) have introduced a "gauging" procedure for fault-tolerant logical measurement in quantum error-correcting codes. Published in Nature Physics, the research was developed during W…
Quantum Computing Report
Industry
Apr 05, 2026
Postquant Labs has officially launched the public testnet for Quip.Network, a decentralized platform designed to bridge the gap between quantum hardware and blockchain infrastructure. With over 13,000 early sign-ups, the network operates as a dual-la…
Quantum Computing Report
Industry
Apr 05, 2026
Large-scale classical simulation of IQPE quantum circuits demonstrated in this work. Larger qubit counts and more Hamiltonian terms result in deeper circuits and longer simulation times. Credit: QIQB, The University of Osaka Osaka University’s Center…
Quantum Computing Report
Industry
Apr 04, 2026
Rigetti Computing (Nasdaq: RGTI) has officially expanded its on-premises footprint with the sale of a 9-qubit Novera™ QPU to the University of Saskatchewan (USask). This acquisition marks a historic milestone as USask becomes home to the first univer…
Quantum Computing Report
Industry
Apr 04, 2026
Infleqtion (NYSE: INFQ), a specialist in neutral-atom quantum technology, and Safran Electronics & Defense have announced the commercial availability of a quantum-enabled precision timing solution. The system integrates Infleqtion’s Tiqker™ quantum o…
Phys.org
Research
Apr 04, 2026
A research team has, for the first time in the world, elucidated the microscopic mechanism by which quantum order is lost and collapses in "open quantum environments" existing in nature. Since perfectly isolated quantum systems cannot exist in realit…
Phys.org
Research
Apr 03, 2026
Detecting a single particle of light is hard; detecting a single microwave photon is even harder. Microwave photons, the tiny packets of electromagnetic radiation used in current technologies like Wi-Fi and radar, carry far less energy than visible l…
Phys.org
Research
Apr 03, 2026
Can a handful of atoms outperform a much larger digital neural network on a real-world task? The answer may be yes. In a study published in Physical Review Letters, a team led by Prof. Peng Xinhua and Assoc. Prof. Li Zhaokai from the University of Sc…
Phys.org
Research
Apr 03, 2026
Quantum states are notoriously fragile, and can be destroyed simply through interactions, measurements, and exposure to their surrounding environments. In a new theoretical study published in Physical Review X, Rohan Mittal and colleagues at the Univ…
Phys.org
Research
Apr 02, 2026
Quantum mechanics is extremely successful at describing the behavior of matter at the atomic level. This success forces one to accept that certain aspects of physical reality go far beyond our intuition. Among these, none is more intriguing than the …
Phys.org
Research
Apr 02, 2026
Imagine you're trying to build a very long, complicated chain of dominoes. The aim is that each domino hits the next one perfectly, all the way down the line, producing an amazing result at the end. A quantum circuit is like a domino chain: a long ch…
Phys.org
Research
Apr 02, 2026
A University of Sydney quantum physicist has developed a new approach to quantum error correction that could significantly reduce the number of physical qubits required to build large-scale, fault-tolerant quantum computers. The study, co-authored by…
Phys.org
Research
Apr 01, 2026
A joint research team between the Center for Quantum Information and Quantum Biology (QIQB) at The University of Osaka and Fixstars Corporation has demonstrated one of the world's largest classical simulations of iterative quantum phase estimation (I…
Phys.org
Research
Apr 01, 2026
Quantum computers of the future may be closer to reality thanks to new research from Caltech and Oratomic, a Caltech-linked start-up company. Theorists and experimentalists teamed up to develop a new approach for reducing the errors that riddle today…
Phys.org
Research
Apr 01, 2026
Researchers at the Technion—Israel Institute of Technology have, for the first time, measured the temporal duration of individual pulses of an extraordinary form of quantum light known as bright squeezed vacuum (BSV). Their findings are published in …
Phys.org
Research
Mar 31, 2026
In the air people breathe, the water on Earth, the stars in the sky and more, atoms are the building blocks that make up the universe. Understanding the structure of the atomic nucleus is crucial for research with implications for astrophysics and in…
Phys.org
Research
Mar 30, 2026
Scientists in the Riccio College of Engineering at the University of Massachusetts Amherst and the University of California Santa Barbara have demonstrated key laser and ion trap components necessary to help drastically shrink the size of quantum com…
Phys.org
Research
Mar 30, 2026
Quantum physicists at ANU have observed atoms entangled in motion. "It's really weird for us to think that this is how the universe works," says Dr. Sean Hodgman from the ANU Research School of Physics. "You can read about it in a textbook, but it's …
Phys.org
Research
Mar 30, 2026
When lasers were invented in the 1960s, they opened new avenues for scientific discovery and everyday applications, from scanners at the grocery store to corrective eye surgery. Conventional lasers control photons—individual particles of light—but ov…
Phys.org
Research
Mar 30, 2026
In quantum technologies, everything depends on the ability to detect the properties carried by a single photon. But in the real world, that photon of interest is often buried in a sea of unwanted light—a true "needle in a haystack" challenge that cur…
Phys.org
Research
Mar 30, 2026
Silicon is ubiquitous in modern electronics, and now it is becoming increasingly useful in quantum computing. In particular, silicon's compatibility with existing chip technology and its long coherence times in silicon-based spin qubits make it a pro…
Phys.org
Research
Mar 30, 2026
Physicists have developed a new theoretical framework which unifies a wide array of seemingly unrelated "Mpemba effects": counterintuitive cases where systems driven further from equilibrium relax faster than those closer to it. Reporting their resul…
Phys.org
Research
Mar 29, 2026
Quantum computers, systems that process information leveraging quantum mechanical effects, could outperform classical computers on some computationally demanding tasks. Despite their potential, as the size of quantum computers increases, reliably des…
Phys.org
Research
Mar 29, 2026
Quantum technologies, devices that can process, store, or detect information leveraging quantum mechanical effects, could outperform classical devices in some tasks or scenarios. Despite their potential, verifying that these devices work correctly an…
Phys.org
Research
Mar 29, 2026
Waterloo scientists have developed a new way to understand how the universe began, and it could change what we know about the Big Bang and the earliest moments of cosmic history. Their work suggests that the universe's rapid early expansion could hav…
Phys.org
Research
Mar 27, 2026
Researchers at the Würzburg site of the Cluster of Excellence ctd.qmat have succeeded in transferring the topological quantum Hall and spin Hall effects to a hybrid light-matter system by harnessing targeted material design. The team led by Professor…