Your daily briefing on quantum computing breakthroughs, research, and industry news.
Insider Brief PRESS RELEASE — In honor of the 2025 Nobel Prize in Physics, Qolab and IQCC are proud to announce the John Martinis Grants for Experimental Superconducting Device Physics. The goal of the program is to provide research and training resources to the next…
IQM Quantum Computers has announced the opening of its first U.S. Quantum Technology Center, located within the University of Maryland’s Discovery District in College Park. The move is a strategic expansion into the North American market, placing the company within the Capital…
Pasqal and Saudi-based computational intelligence firm True Nexus (a branch of AI Bobby) have entered a strategic partnership to apply neutral-atom quantum computing to the study of protein functionality. The initiative focuses on addressing technical barriers in the alternative…
Insider Brief PRESS RELEASE — IQM Quantum Computers, a global leader in superconducting quantum computing, and the Capital of Quantum (CoQ) announced today the establishment of IQM’s first U.S. Quantum Technology Center in Discovery District Maryland. This strategic…
Insider Brief Actually, don’t stick a fork in Bitcoin. While quantum computing poses a known threat to Bitcoin, a new proposal suggests the network could defend itself without changing its core protocol. In a recent paper, StarkWare researcher Avihu Mordechai Levy…
Insider Brief Small quantum computers could process massive datasets more efficiently than far larger classical systems, according to a study recently posted on arXiv that outlines a path to exponential gains in machine learning and data analysis. The study, conducted by…
QuantrolOx, a developer of measurement and automation platforms for quantum hardware, has partnered with Singapore-based RAQS Quantum to bring its Quantum EDGE platform and Quantum EDGE Academy to the Asia Pacific region. Announced at GITEX Asia 2026, the collaboration addresses…
Overview of Q-NEXUS: a heterogeneous architecture made of specialized functional modules connected through an interconnect bus Q-CTRL has introduced Q-NEXUS, a heterogeneous quantum computing architecture designed to address the physical resource bottlenecks currently limiting…
Insider Brief The quantum sensing sector has seen substantial investment and accelerating commercialization in recent years. Growth is driven by multiple converging factors such as increased government investment in quantum technologies, commercial viability of early-stage…
Insider Brief PRESS RELEASE — As part of its Quantum Initiative, the University of Houston convened global industry leader IonQ, national laboratory partners and energy executives for the symposium, “Powering the Future: Quantum Technologies in the Energy Economy,”…
arXiv:2604.07425v1 Announce Type: new Abstract: The manuscript [arXiv:2603.19208] proposes a physically motivated postulate to select the appropriate formulation of quantum theory over real Hilbert spaces, ruling out the theory considered in [Nature 600, 625-629 (2021)] in…
arXiv:2604.07436v1 Announce Type: new Abstract: Quantum simulations of high-energy physics in $2+1$D can probe dynamical phenomena nonexistent in one spatial dimension and access regimes that are challenging for existing classical simulation methods. For string dynamics --…
arXiv:2604.07439v1 Announce Type: new Abstract: Solid-state spin defects are a promising platform for quantum networks. A key requirement is to combine long ground-state spin-coherence times with a coherent optical transition for spin-photon entanglement. Here, we investigate…
arXiv:2604.07442v1 Announce Type: new Abstract: Periodically driven quantum systems can exhibit subharmonic response, usually characterized through physical observables and often discussed in interacting settings. Here we show that a sharp subharmonic signature already appears…
arXiv:2604.07448v1 Announce Type: new Abstract: We study the regimes in which Hamiltonian simulation benefits from randomization. We introduce a sparse-QSVT construction based on composite stochastic decompositions, where dominant terms are treated deterministically and smaller…
arXiv:2604.07451v1 Announce Type: new Abstract: Remote entanglement enables coordinated decision making without communication and produces correlations beyond those achievable by any classical strategy, representing a practical quantum advantage in time-critical distributed…
arXiv:2604.07452v1 Announce Type: new Abstract: In dense neutrino gases, which exist for instance in supernovae, the flavour states of different neutrinos may become entangled with one another. The theoretical description of such systems may therefore call for simulations on a…
arXiv:2604.07460v1 Announce Type: new Abstract: In this work, we consider the fundamental task of quantum state certification: given copies of an unknown quantum state $\rho$, test whether it matches some target state $\sigma$ or is $\epsilon$-far from it. For certifying…
arXiv:2604.07471v1 Announce Type: new Abstract: A foundational result in relativistic quantum information theory due to Peres, Scudo, and Terno, is that von Neumann entropy is not Lorentz invariant. Motivated by the "It from Qubit" paradigm, here we show that Lorentzian…
arXiv:2604.07633v1 Announce Type: new Abstract: We analyze fermionic entanglement and correlation measures in the ground and the low temperature thermal state of the water molecule as a function of the internuclear distance in the context of the full configuration interaction…
arXiv:2604.07639v1 Announce Type: new Abstract: Broadly applicable quantum advantage, particularly in classical data processing and machine learning, has been a fundamental open problem. In this work, we prove that a small quantum computer of polylogarithmic size can perform…
arXiv:2604.07641v1 Announce Type: new Abstract: Entanglement criteria based on variances or Fisher information are well developed for compact collective spin algebras, but their extension to non-compact dynamical sectors is less straightforward. In particular, double-quantum…
arXiv:2604.07682v1 Announce Type: new Abstract: Precise environmental-noise characterisation in open quantum systems is a key step toward high-fidelity quantum control and targeted decoherence suppression in computing and sensing applications. Non-parametric quantum noise…
arXiv:2604.07704v1 Announce Type: new Abstract: Efficiently simulating many-body quantum systems with Coulomb interactions is a fundamental question in quantum physics, quantum chemistry, and quantum computing, yet it presents unique challenges: the Hamiltonian is an unbounded…
arXiv:2604.07714v1 Announce Type: new Abstract: We investigate the critical behavior of momentum-space entanglement entropy at dynamical quantum phase transitions (DQPTs) in translationally invariant two-band insulators and superconductors. By analyzing the Su-Schrieffer-Heeger…
arXiv:2604.07787v1 Announce Type: new Abstract: Integral transformations are useful mathematical tool to work out signals and wave-packets in electronic devices. They may be used in software protocols. Necessary knowledge may come from quantum field theory, in particular from…
arXiv:2604.07804v1 Announce Type: new Abstract: Continuous-variable (CV) cluster states offer a promising platform for large-scale measurement-based quantum computations (MBQC). However, finite squeezing inevitably introduces Gaussian noise during MBQC. While fault-tolerant MBQC…
arXiv:2604.07828v1 Announce Type: new Abstract: Phase estimation in quantum interferometry is a major scenario where the quantum advantage is significantly revealed. Recently, the optimal finite-dimensional probe states (OFPSs) for phase estimation in two-mode quantum…
arXiv:2604.07847v1 Announce Type: new Abstract: We revisit the longstanding issue of why no well defined probability measure exists corresponding to a classical (Kolmogorov) path integral representation of the Dirac equation in Minkowski space. Two complementary perspectives are…
arXiv:2604.07849v1 Announce Type: new Abstract: Noise is a major challenge in quantum computing, affecting the reliability of quantum protocols. In this work, we analytically study the impact of various noise processes, such as depolarization, bit flip, and phase flip, on the…
arXiv:2604.07856v1 Announce Type: new Abstract: Deploying quantum machine learning algorithms on near-term quantum hardware requires circuits that respect device-specific gate sets, connectivity constraints, and noise characteristics. We present a hardware-aware Neural…
arXiv:2604.07862v1 Announce Type: new Abstract: Programmable neutral-atom arrays offer a promising route toward scalable quantum computing, where coherent qubit transfer enables non-local connectivity and reduces resource overhead. However, transfer speed and motional heating…
arXiv:2604.07873v1 Announce Type: new Abstract: Clustering is one of the most fundamental tasks in machine learning, and the k-means clustering algorithm is perhaps one of the most widely used clustering algorithms. However, it suffers from several limitations, such as…
arXiv:2604.07893v1 Announce Type: new Abstract: We propose and analyse a quantum thermal field-effect transistor (qtFET) composed of left-qubit, middle-qutrit, and right-qubit subsystems. In this architecture, the left qubit is coupled to the middle qutrit, which in turn…
arXiv:2604.07896v1 Announce Type: new Abstract: Quantum kernel methods (QKMs) have emerged as a prominent framework for supervised quantum machine learning. Unlike variational quantum algorithms, which rely on gradient-based optimisation and may suffer from issues such as barren…
arXiv:2604.07909v1 Announce Type: new Abstract: Variational quantum algorithms (VQAs) have established themselves as a central computational paradigm in the Noisy Intermediate-Scale Quantum (NISQ) era. By coupling parameterized quantum circuits (PQCs) with classical…
arXiv:2604.07926v1 Announce Type: new Abstract: Quantum systems are inherently fragile to environmental fluctuations or decoherence, limiting their advantages in applications of quantum information and quantum computation. State purification offers a route to recover the purity…
arXiv:2604.07951v1 Announce Type: new Abstract: Efficient ground state search is fundamental to advancing combinatorial optimization problems and quantum chemistry. While the Variational Imaginary Time Evolution (VITE) method offers a useful alternative to Variational Quantum…
arXiv:2604.07954v1 Announce Type: new Abstract: We study quantum property testing for directed graphs with maximum in-degree and out-degree bounded by some universal constant $d$. For a proximity parameter $\varepsilon$, we show that any property that can be tested with…
arXiv:2604.07971v1 Announce Type: new Abstract: Ground-state cooling is a prerequisite for exploring macroscopic quantum effects in mechanical motion of massive objects. Here we construct a polarization-angle-controllable coupled cavity-levitated-nanoparticle system in which two…
arXiv:2604.07995v1 Announce Type: new Abstract: Decoding Bivariate Bicycle (BB) quantum error correction codes typically requires Belief Propagation (BP) followed by Ordered Statistics Decoding (OSD) post-processing when BP fails to converge. Whether BP will converge on a given…
arXiv:2604.08023v1 Announce Type: new Abstract: The dark-state effect, caused by destructive interference, not only is an important fundamental research topic in atomic physics and quantum optics, but also has wide potential application in quantum physics and quantum information…
arXiv:2604.08024v1 Announce Type: new Abstract: Semi-classical approaches approximate fully quantum descriptions with partially classical ones. Here we use a toy model to highlight the failings of the standard mean-field semi-classical approach, and show how including…
arXiv:2604.08054v1 Announce Type: new Abstract: We investigate the task of local marking for locally implementable unitary operations. In this setting, multipartite quantum unitary channels, chosen randomly from a known set, are distributed among spatially separated parties…
arXiv:2604.08057v1 Announce Type: new Abstract: We introduce the concept of self-guided imaging (SGI) as a linear analogue of self-guided quantum tomography (SGQT). We show that SGI is mathematically equivalent to single-pixel imaging (SPI). Taking inspiration from…
arXiv:2604.08094v1 Announce Type: new Abstract: We investigate how to combine a collection of quantum binary models into a multinomial classifier. We employ a hybrid approach, adopting strategies like one-vs-one, one-vs-rest and a binary decision tree. We benchmark each method,…
arXiv:2604.08139v1 Announce Type: new Abstract: We develop a theoretical description of quantum wave mixing (QWM) in a cascaded waveguide-QED system of two superconducting qubits, where the probe is driven by an external coherent tone and by the resonance fluorescence of a…
arXiv:2604.08151v1 Announce Type: new Abstract: We investigate work extraction in open quantum batteries composed of interacting spin chains weakly coupled to engineered environments. Focusing on two- and four-qubit XX models initially prepared in thermal Gibbs states, we…
arXiv:2604.08241v1 Announce Type: new Abstract: Quantum communication protocols require efficient detection schemes to maximize the information transfer rate between the sender and the receiver. To this aim, we have demonstrated that weak-field receivers, merging wave-like and…
arXiv:2604.08247v1 Announce Type: new Abstract: The Gottesman-Kitaev-Preskill (GKP) code is a promising bosonic candidate for realizing fault-tolerant quantum computation. Among existing error-correction protocols for GKP code, the Steane-type scheme is a canonical and widely…
arXiv:2604.08277v1 Announce Type: new Abstract: We present a quantum-inspired ARIMA methodology that integrates quantum-assisted lag discovery with \emph{fixed-configuration} variational quantum circuits (VQCs) for parameter estimation and weak-lag refinement. Differencing and…
arXiv:2604.08318v1 Announce Type: new Abstract: The integration of large language models (LLMs) into scientific research is accelerating the realization of autonomous ``AI Scientists.'' While recent advancements have empowered AI to formulate hypotheses and design experiments, a…
arXiv:2604.08349v1 Announce Type: new Abstract: We investigate when temporal ordering becomes operationally meaningful in relativistic quantum field theory using localized detector models. A time parameter alone does not ensure that different sequences of operations are…
arXiv:2604.08358v1 Announce Type: new Abstract: Quantum error correction (QEC) is essential for scalable quantum computing. However, it requires classical decoders that are fast and accurate enough to keep pace with quantum hardware. While quantum low-density parity-check codes…
arXiv:2604.08367v1 Announce Type: new Abstract: The Quantum Approximate Optimization Algorithm (QAOA) has emerged as a promising approach for addressing combinatorial optimization problems on near-term quantum hardware. In this work, we conduct an empirical evaluation of QAOA on…
arXiv:2604.08380v1 Announce Type: new Abstract: We study the interconversion of families of quantum states ("statistical experiments") via positive, trace-preserving (PTP) maps and clarify its mathematical structure in terms of minimal sufficient Jordan algebras, which can be…
arXiv:2604.08408v1 Announce Type: new Abstract: Gibbs states are a natural model of quantum matter at thermal equilibrium. We investigate the role of external fields in shaping the entanglement structure and computational complexity of high-temperature Gibbs states. External…
arXiv:2604.08427v1 Announce Type: new Abstract: Quantum reservoir computing is a promising paradigm for processing temporal data. So far, the primary focus has been on univariate time series. However, the most relevant and complex real-world data is multidimensional. In this…
arXiv:2604.08466v1 Announce Type: new Abstract: Impurity Hamiltonians are systems of $N$ fermionic modes where $O(1)$ of them interact among themselves via quartic (or higher order) fermion terms, while coupling quadratically with $O(N)$ bath modes. Without the quartic…
arXiv:2604.08467v1 Announce Type: new Abstract: Quantum trajectory methods reduce the computational overhead of simulating noisy quantum systems, approximating them with $m$ stochastically sampled $2^n$-entry quantum statevectors rather than exact $2^{2n}$-entry density…
arXiv:2604.08515v1 Announce Type: new Abstract: Understanding the mechanisms that limit high-fidelity readout in circuit quantum electrodynamics is essential for its optimization. Multi-photon resonances are understood to be a limiting factor, causing population transfer from…
arXiv:2511.11494v2 Announce Type: cross Abstract: Quantum computing holds the promise of solving computational mechanics problems in polylogarithmic time, meaning computational time scales as $\mathscr{O}((\log N)^c)$, where $N$ is the problem size and $c$ a constant. We propose…
arXiv:2604.07435v1 Announce Type: cross Abstract: A major goal of the quantum simulation of high-energy physics (HEP) is to probe real-time nonperturbative far-from-equilibrium quantum processes underlying phenomena such as hadronization in quantum chromodynamics (QCD). The…
arXiv:2604.08298v1 Announce Type: cross Abstract: We initiate the study of asynchronous quantum distributed systems, focusing on the case of implementing atomic quantum global operations that can be decomposed into a collection of local operations on the components of the…
arXiv:2307.15688v3 Announce Type: replace Abstract: Understanding and approximating extremal energy states of local Hamiltonians is a central problem in quantum physics and complexity theory. Recent work has focused on developing approximation algorithms for local Hamiltonians,…
arXiv:2312.17719v4 Announce Type: replace Abstract: Many alternative approaches to construct quantum channels with large entangling capacity were proposed in the past decade, resulting in multiple isolated gates. In this work, we put forward a novel one, inspired by convolution,…
arXiv:2402.17148v2 Announce Type: replace Abstract: Finance, especially option pricing, is a promising industrial field that might benefit from quantum computing. While quantum algorithms for option pricing have been proposed, it is desired to devise more efficient…
arXiv:2406.12086v2 Announce Type: replace Abstract: Given a linear system of equations $A\boldsymbol{x}=\boldsymbol{b}$, quantum linear system solvers (QLSSs) approximately prepare a quantum state $|\boldsymbol{x}\rangle$ for which the amplitudes are proportional to the solution…
arXiv:2409.14598v2 Announce Type: replace Abstract: With the increasing demand for quantum hardware, shared and multi-tenant environments have been proposed to optimize resource utilization. However, the multi-tenancy paradigm in quantum computing inherently introduces security…
arXiv:2412.03808v2 Announce Type: replace Abstract: We can design efficient quantum error-correcting (QEC) codes by tailoring them to our choice of quantum architecture. Useful tools for constructing such codes include Clifford deformations and appropriate gauge fixings of…
arXiv:2412.10505v3 Announce Type: replace Abstract: As a striking manifestation of quantum entanglement, nonlocality has long played a pivotal role in shaping our understanding of the quantum world. When considering a Bell test involving three parties, we may even find a…
arXiv:2505.13933v2 Announce Type: replace Abstract: Recent advances in quantum computing have demonstrated its potential to significantly enhance the analysis and forecasting of complex classical data. Among these, quantum reservoir computing has emerged as a particularly…
arXiv:2506.00650v2 Announce Type: replace Abstract: We investigate the stability of logical information in quantum stabilizer codes subject to coherent unitary errors. Beginning with a logical state, we apply a random unitary error channel and subsequently measure stabilizer…
arXiv:2507.10908v2 Announce Type: replace Abstract: The Quantum Approximate Optimisation Algorithm (QAOA) is a leading candidate for near-term quantum advantage, yet its practical impact is hindered by limited performance on symmetric local Hamiltonians and the costly…
arXiv:2507.23679v3 Announce Type: replace Abstract: Efficient parametrizations of quantum states are essential for trainable hybrid classical-quantum algorithms. A key challenge in their design consists in adapting to the available qubit connectivity of the quantum processor,…
arXiv:2508.06121v2 Announce Type: replace Abstract: Quantum amplitude estimation is one of the core subroutines in quantum algorithms. This paper gives a parallelized amplitude estimation (PAE) algorithm that simultaneously achieves near-Heisenberg scaling in the total number of…
arXiv:2508.09933v2 Announce Type: replace Abstract: The Poincar\'e recurrence theorem shows that conservative systems in a bounded region of phase space eventually return arbitrarily close to their initial state after a finite amount of time. An analogous behavior occurs in…
arXiv:2509.10425v2 Announce Type: replace Abstract: Quantum simulation has emerged as a key application of quantum computing, with significant progress made in algorithms for simulating both closed and open quantum systems. The simulation of open quantum systems, particularly…
arXiv:2510.05008v3 Announce Type: replace Abstract: Classical error-correcting codes are powerful but incompatible with quantum noise, which includes both bit-flips and phase-flips. We introduce Hadamard-based Virtual Error Correction (H-VEC), a protocol that empowers any…
arXiv:2510.15243v2 Announce Type: replace Abstract: We introduce a quantum voting protocol that uses superposition and entanglement to enable secure, anonymous voting in both centralized and distributed settings. Votes are encoded via phase-flip operations on entangled candidate…
arXiv:2510.16149v2 Announce Type: replace Abstract: The preparation of data in quantum states is a critical component in the design of quantum algorithms. The cost of this step can significantly limit the realization of quantum advantage in domains such as machine learning,…
arXiv:2510.19552v2 Announce Type: replace Abstract: Quantum battery is expected to outperform its classical counterpart due to quantum effects. Usually, in a quantum battery made of $N$ cells, quantum advantage is demonstrated through super-extensive scaling of the upper bound…
arXiv:2510.19598v3 Announce Type: replace Abstract: Spin defects in diamond serve as powerful building blocks for quantum technologies, especially for applications in quantum sensing and quantum networking. Electron-nuclear defects formed in the environment of optically active…
arXiv:2511.05672v2 Announce Type: replace Abstract: Randomness is fundamental for secure communication and information processing. While continuous-variable optical systems offer an attractive platform for this task, certifying genuine quantum randomness in such setups remains…
arXiv:2511.11056v2 Announce Type: replace Abstract: We investigate the fast-forward and time-scaling properties of superconducting resonators under an off-resonant coherent drive. We propose a scheme for perfect displacement of a superconducting resonator by modulating the drive…
arXiv:2512.01999v2 Announce Type: replace Abstract: The generation of engineered quantum states of light via nonlinear processes is fundamental for quantum technologies based on photons. Although embedding nonlinear materials within resonant structures allows for the enhancement…
arXiv:2512.07822v4 Announce Type: replace Abstract: In quantum technologies, quantum channels are essential elements for the transmission of quantum states. The action of a quantum channel usually introduces noise in the quantum state and thereby reduces the information…
arXiv:2512.07902v3 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 $C\ell_{2,0}(\mathbb{R})^{\otimes n}$. In this setting, the…
arXiv:2512.16168v3 Announce Type: replace Abstract: Nelson's stochastic mechanics formulates quantum dynamics as a real-time conservative diffusion process in which a particle undergoes Brownian-like motion with a fluctuation amplitude fixed by Planck's constant. While being…
arXiv:2601.07198v3 Announce Type: replace Abstract: Quantum thermometry aims to measure temperature in nanoscale quantum systems, paralleling classical thermometry. However, temperature is not a quantum observable, and most theoretical studies have therefore concentrated on…
arXiv:2602.05080v3 Announce Type: replace Abstract: Nonlinear spectroscopic techniques using entangled photon pairs can provide an opportunity to exploit non-classical correlations encoded in two-photon wavefunctions to manipulate two-exciton wavefunctions. We propose an…
arXiv:2602.08880v2 Announce Type: replace Abstract: Designing high-fidelity quantum circuits remains challenging, and current paradigms often depend on heuristic, fixed-ansatz structures or rule-based compilers that can be suboptimal or lack generality. We introduce a…
arXiv:2602.15933v2 Announce Type: replace Abstract: Isotropic integrable spin chains such as the Heisenberg model feature superdiffusive spin transport belonging to an as-yet-unidentified dynamical universality class closely related to that of Kardar, Parisi, and Zhang (KPZ). To…
arXiv:2603.06848v2 Announce Type: replace Abstract: Characterizing noise in superconducting qubits is essential for improving coherence and gate performance. Conventional noise-sensing methods typically use the qubit itself as the sensor, which limits both accessible bandwidth…
arXiv:2603.14670v2 Announce Type: replace Abstract: We introduce a sparse classical representation, a truncation strategy and a shot-efficient sampling method to push the classical prediction of quantum error correction thresholds beyond Clifford operations and Pauli errors. As…
arXiv:2604.01930v2 Announce Type: replace Abstract: We propose a geometry-driven quantum-inspired classification framework that integrates Correlation Group Structures (CGR), compact SWAP-test-based overlap estimation, and selective variational quantum decision modelling. Rather…
arXiv:2604.05505v2 Announce Type: replace Abstract: As quantum computing moves from isolated experiments toward integration with large-scale workflows, the integration of quantum devices into HPC systems has gained much interest. Quantum cloud providers expose shared devices…
arXiv:2604.05675v2 Announce Type: replace Abstract: In several articles, this author has advocated an alternative approach towards quantum foundation based upon a set of postulates, and based upon the notions of theoretical variables and of accessible theoretical variables. It…
arXiv:2212.11740v4 Announce Type: replace-cross Abstract: We investigate separability and entanglement of Rokhsar-Kivelson (RK) states and resonating valence-bond (RVB) states. These states play a prominent role in condensed matter physics, as they can describe quantum spin…
arXiv:2409.08428v2 Announce Type: replace-cross Abstract: We study a class of Unitary Quantum Walks on arbitrary graphs, parameterized by a family of scattering matrices. These Scattering Quantum Walks model the discrete dynamics of a system on the edges of the graph, with a…
arXiv:2508.04788v3 Announce Type: replace-cross Abstract: Quantum sensing with individual spin defects has emerged as a versatile platform to probe microscopic properties of condensed matter systems. Here we demonstrate that quantum relaxometry with nitrogen-vacancy (NV) centers…
arXiv:2512.03647v2 Announce Type: replace-cross Abstract: Ultracold neutral atoms in optical lattices are a promising platform for simulating the behavior of complex materials and implementing quantum gates. We optimize collision gates for fermionic Lithium atoms confined in a…
arXiv:2601.15971v3 Announce Type: replace-cross Abstract: Superconducting nanowire single-photon detectors (SNSPDs) combine high detection efficiency, low noise, and excellent timing resolution, making them a leading platform for photon-counting applications. However, despite…
arXiv:2602.09100v2 Announce Type: replace-cross Abstract: How many canonical degrees of freedom does a quantum field theory actually use during its Hamiltonian evolution? For a UV/IR-regularised classical scalar field, we address this question directly at the level of…
arXiv:2603.01466v3 Announce Type: replace-cross Abstract: Violation of Bell inequalities in bipartite systems represented by mutually-commuting von Neumann algebras has pioneered the study of vacuum entanglement, and linked Bell nonlocality to the locality conditions in…
arXiv:2603.02338v2 Announce Type: replace-cross Abstract: Entanglement asymmetry provides a quantitative measure of symmetry breaking in many-body quantum states. Focusing on inhomogeneous $U(1)$ charges, such as dipole and multipole moments, we show that the typical asymmetry…
arXiv:2604.00732v2 Announce Type: replace-cross Abstract: We study a composite model of two $1D$ $PXP$ chains with dual constraints, forming a junction that acts as an infinite kinematic barrier to quantum information exchange. Moreover, the hard wall at the junction which acts…
Terra Quantum AG, a St. Gallen-based leader in hybrid quantum-classical solutions, has signed a non-binding letter of intent (LOI) to go public through a business combination with Mountain Lake Acquisition Corp. II (Nasdaq: MLAA). The transaction values Terra Quantum at $3.25…
Qoro Quantum, a London-based deep-tech startup, has raised $750,000 in pre-seed funding to address the integration bottleneck between classical and quantum computing. The round was led by Ada Ventures, with participation from Superangels Venture Fund and the Polsky Center for…
Horizon Quantum Holdings Ltd. (Nasdaq: HQ) and IonQ (NYSE: IONQ) have announced a strategic agreement for the purchase of a 6th-generation, chip-based 256-qubit trapped-ion system. This acquisition is a core component of Horizon Quantum’s strategy to expand its hardware testbed…
Infleqtion (NYSE: INFQ), in collaboration with NASA’s Jet Propulsion Laboratory (JPL), has provided an upgraded physics package to the International Space Station (ISS) via the Northrop Grumman-24 (NG-24) cargo mission. This hardware update is designed for the Cold Atom…
Insider Brief PRESS RELEASE — Terra Quantum AG (“Terra Quantum”), a leading quantum technology company, and Mountain Lake Acquisition Corp. II (“MLAC II”) (Nasdaq: MLAA), a special purpose acquisition company, today announced that they have signed a non-binding letter of…
Insider Brief PRESS RELEASE — The Cleveland Clinic Quantum Innovation Catalyzer Program announced its newest cohort of start-up company awardees advancing quantum computing applications in healthcare and life sciences. The competitive program selected three early- and…
Insider Brief PRESS RELEASE — Infleqtion (NYSE: INFQ) (the “Company”) a global leader in quantum computing and quantum sensing powered by neutral-atom technology, today announced 2026 revenue guidance of $40 million in conjunction with its previously announced business…
Riverlane, a developer of quantum error correction (QEC) technology, has released performance metrics for its second-generation Deltaflow 2 system, demonstrating a mean latency of 16.32µs. This result was achieved using data from Google’s 2024 "Willow" experiment, which involved…
QuiX Quantum has appointed Robin Wittland as Chief Commercial Officer (CCO). Wittland brings over 25 years of experience from senior leadership roles at Microsoft and WORTMANN AG, and most recently served as CCO at planqc. In his new role, he will lead QuiX Quantum’s global…
Insider Brief PRESS RELEASE — Infleqtion (NYSE: INFQ), a global leader in quantum computing and quantum sensing powered by neutral-atom technology, is providing upgraded quantum hardware to the International Space Station (ISS) via NASA’s Northrop Grumman-24 (NG-24)…
The heart’s faint magnetic signals can’t be detected at large distances, researchers say
npj Quantum Information, Published online: 09 April 2026; doi:10.1038/s41534-026-01231-0Virtual purification complements quantum error correction in quantum metrology
Researchers at ETH Zurich have realized particularly stable quantum logical operations with qubits made of neutral atoms. Since these operations, called quantum gates, are based on geometric phases, they are extremely robust against experimental noise and can be used in quantum…
A new analysis reveals what happens when very short or narrow electron beams encounter a particle. The research is published in the New Journal of Physics. Scientists should be able to achieve a new level of control over high-energy electrons interacting with a particle,…
Researchers at the Karlsruhe Institute of Technology (KIT) have reported important progress in quantum physics and materials science by optically initializing, controlling, and reading out nuclear spin states in a molecular material for the first time. Because of their weak…
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 can be executed without such…
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 much farther along in their…
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 of a levitated silica…
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 in newly discovered "moiré…
npj Quantum Information, Published online: 06 April 2026; doi:10.1038/s41534-026-01232-zNonlocality, integrability and quantum chaos in the spectrum of bell operators
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 reality, this study is expected to…
npj Quantum Information, Published online: 04 April 2026; doi:10.1038/s41534-026-01227-wContractive unitary and classical shadow tomography
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 light. They are about 100,000…
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 Science and Technology of China…
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 University of Cologne have…
npj Quantum Information, Published online: 03 April 2026; doi:10.1038/s41534-026-01224-zDistributed quantum sensing with measurement-after-interaction strategies
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 concept of quantum…
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 chain of tiny steps…
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 Dr. Dominic Williamson from…
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 (IQPE) circuits for quantum…
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's rudimentary quantum…
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 Optica.
npj Quantum Information, Published online: 01 April 2026; doi:10.1038/s41534-026-01218-xQuantum cryptanalysis of SPN ciphers with known plaintext
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 applications such as medical…
npj Quantum Information, Published online: 31 March 2026; doi:10.1038/s41534-026-01225-yFiber-integrated quantum frequency conversion for long-distance quantum networking
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 computers, an achievement…
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 really weird to think that a…
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 over the past 20 years,…
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 currently limits the deployment…
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 promising material for scalable…
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 results in Physical Review X,…
npj Quantum Information, Published online: 30 March 2026; doi:10.1038/s41534-026-01201-6Scalable conflict-free bandit algorithm using a quantum optical setup
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 describing and measuring the…
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 and truly realize desired…
npj Quantum Information, Published online: 28 March 2026; doi:10.1038/s41534-026-01226-xOn the constant depth implementation of Pauli exponentials