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The Quantum Insider
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 venture-stage companies f
The Quantum Insider
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 update call. The Company
The Quantum Insider
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) cargo mission. The upg
The Quantum Insider
Insider Brief PRESS RELEASE — Horizon Quantum Holdings Ltd. (“Horizon Quantum”), a pioneer of software infrastructure for quantum applications and IonQ — the world’s leading quantum platform company — today announced a strategic agreement. Horizon Quantum will purchase one of IonQ’s first 6th-
The Quantum Insider
Insider Brief PRESS RELEASE — SuperQ Quantum Computing Inc. (“SuperQ Quantum”, “SuperQ”, or the “Company”) (CSE: QBTQ; OTCQB: QBTQF; Frankfurt: 25X), a leader in sovereign quantum-safe infrastructure and AI-orchestrated cybersecurity, today announced it has joined forces with Quantum
The Quantum Insider
The Vanderbilt Quantum Forum is bringing together leaders from academia, industry, government, and national laboratories to examine the near-term implications of quantum technology across energy, security, healthcare and economic competitiveness. A livestream of the event will be held from 9 a.m.–6:
The Quantum Insider
Insider Brief PRESS RELEASE — QNu Labs (www.qnulabs.com), a global leader in end-to-end hybrid quantum cybersecurity solutions, has announced the findings of a research study conducted in association with VIAVI Solutions, a global leader in network test and measurement. The study leverage
The Quantum Insider
Insider Brief PRESS RELEASE —  Qoro has announced the close of its pre-seed funding round, securing $750,000 USD to build the missing software layer for hybrid quantum-classical computing. The round includes backing from UK-based Ada Ventures, European early-stage investor 
The Quantum Insider
Insider Brief Yaqumo Inc. (Headquarters: Chiyoda-ku, Tokyo; CEO: Kazuhiro Nakashoji), a startup developing scalable neutral-atom quantum computers, announced today that it has raised a Seed Extension Round from Quantonation II FPCI (“Quantonation”), the world’s largest venture capital fu
The Quantum Insider
Insider Brief PRESS RELEASE — Quantum bits, or qubits, which are required for building quantum computers, come in different kinds. In recent years, many research institutes and companies have focused on superconducting circuits and trapped ions. However, neutral atoms trapped with laser light
Nature Quantum
Nature Quantum
Quantum Computing Report
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 a distance-5 (d5) ro
Quantum Computing Report
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 commercial strategy and s
Quantum Computing Report
QuantumDiamonds GmbH, the Munich-based specialist in diamond-based quantum sensing, has successfully installed its first QD m.1 system in the United States at Eurofins EAG Laboratories in Sunnyvale, California. This deployment marks a significant transition for the company from its initial product l
Quantum Computing Report
Cloudflare has officially updated its post-quantum (PQ) security roadmap, shifting its target for full system-wide resilience to 2029. This acceleration is driven by recent and unexpected advancements in quantum factoring efficiency, which suggest that the window for migrating global internet infras
Quantum Computing Report
Quantum XChange has announced the release of the Phio TX® Centralized Management Console (CMC), a platform designed to provide unified oversight and administrative control over quantum-safe key delivery across distributed networks. The CMC is an expansion of the company’s flagship Phio TX platform,
Quantum Computing Report
The National Quantum Mission (NQM) has reached a pivotal technical landmark with the successful demonstration of a 1,000-km quantum communication network, one of the longest in the world. Announced by Union Minister for Science & Technology Dr. Jitendra Singh during a review of the Department of
Quantum Computing Report
SuperQ Quantum Computing Inc. (CSE: QBTQ) has joined the Quantum Security Defence (QSECDEF) alliance, an international ecosystem focused on securing critical infrastructure against quantum-enabled threats. This integration comes as global pressure for Post-Quantum Cryptography (PQC) migration intens
Quantum Computing Report
Equal1 and Q-CTRL have announced a partnership to integrate Boulder Opal Scale Up infrastructure software into Equal1’s silicon-based quantum computers. This integration is designed to automate the calibration and "boot-up" sequences of the Bell-series systems, aiming to remove the requirement for m
Quantum Computing Report
Multipeak Global and RAQS Quantum have entered into a strategic collaboration aimed at translating quantum and quantum-inspired computing research into industrial applications. Based in Singapore, the partnership focuses on deploying "quantum-ready" solutions across the Asian and European markets. B
Quantum Computing Report
QBoson, a Beijing-based developer of photonic quantum hardware, has closed a Series B funding round totaling CNY 1 billion ($145 million). The capital injection was jointly led by a consortium of state-supported and institutional investors, including Beijing Financial Holdings Group, ICBC Capital, B
arXiv Quantum Physics
arXiv:2604.06270v1 Announce Type: new
Abstract: Efficient data encoding is the main factor affecting how fast hybrid quantum-classical algorithms run, but traditional simulators spend most of their time changing classical features into quantum rotations. This work introduces Hybriqu Encoder, a Rust
arXiv Quantum Physics
arXiv:2604.06303v1 Announce Type: new
Abstract: We study the protocol of entanglement harvesting when two local probes couple to the vacuum of a real scalar quantum field with arbitrary temporal profiles. We use a Hermite expansion to efficiently compute smeared field propagators in closed-form, re
arXiv Quantum Physics
arXiv:2604.06319v1 Announce Type: new
Abstract: Quantum computer hardware is predicted to scale over hundreds of thousands of qubits coming online in the next decade. Despite significant theoretical and experimental QEC progress, quantum computer architecture has suffered a significant gap, with bo
arXiv Quantum Physics
arXiv:2604.06322v1 Announce Type: new
Abstract: General relativity and quantum mechanics are incompatible at the Planck scale. This contention can be examined if a quantum computer is set to operate at a rate that exceeds the classical limit of one operation per Planck volume-time, or equivalently
arXiv Quantum Physics
arXiv:2604.06325v1 Announce Type: new
Abstract: We study the task of lifting arbitrary quantum states and channels to purifications and Stinespring dilations, respectively, in both the probabilistic exact and deterministic approximate settings. We formalize this task through a general framework of
arXiv Quantum Physics
arXiv:2604.06410v1 Announce Type: new
Abstract: Radiative coupling between quantum emitters leads to a range of spectacular emission phenomena. Dicke studied the foundations of collectively enhanced and suppressed decay, commonly referred to as super- and subradiance. Collective effects can further
arXiv Quantum Physics
arXiv:2604.06412v1 Announce Type: new
Abstract: Complex numbers are central to the formulation of quantum mechanics, yet their role as a genuine resource is only beginning to be understood. In this work, we demonstrate that quantum states with intrinsically complex amplitudes provide a fundamental
arXiv Quantum Physics
arXiv:2604.06450v1 Announce Type: new
Abstract: A basic model is provided that places active, intentional choices by biological organisms on a solid physical footing. The model is provisionally called "Agent Choice via Quantum Flux." It brings to bear specific physics on living systems in a way tha
arXiv Quantum Physics
arXiv:2604.06455v1 Announce Type: new
Abstract: We develop a dissipative extension of classical mechanics based on a complex, and more generally quaternionic, action principle that endows every classical system with an intrinsic environment. Decomposing the action into conservative and divergence-i
arXiv Quantum Physics
arXiv:2604.06457v1 Announce Type: new
Abstract: Although quantum random number generators rely on the inherent indeterminism of quantum mechanics, ensuring that the numbers produced are secure remains a significant challenge. We introduce two semi-device-independent randomness expansion protocols i
arXiv Quantum Physics
arXiv:2604.06461v1 Announce Type: new
Abstract: We introduce a systematic protocol for constructing quantum Hilbert-space-fragmented Hamiltonians, whose Krylov-sector structure, unlike in classically fragmented models, can be fully resolved only in an entangled basis. The protocol takes as input a
arXiv Quantum Physics
arXiv:2604.06466v1 Announce Type: new
Abstract: We unite two of the most widely used approaches for strongly damped, non-Markovian open quantum dynamics, the Hierarchical Equations of Motion (HEOM) and the pseudomode method by proving two statements: First, every physical bath correlation function
arXiv Quantum Physics
arXiv:2604.06523v1 Announce Type: new
Abstract: Quantum operations on pure states can be fully represented by unitary matrices. Variational quantum circuits, also known as quantum neural networks, embed data and trainable parameters into gate-based operations and optimize the parameters via gradien
arXiv Quantum Physics
arXiv:2604.06528v1 Announce Type: new
Abstract: The field of high-dimensional quantum photonics involves the use of multimode photonic degrees-of-freedom such as the spatial, temporal, or spectral structure of light to encode multi-level quantum states. Recent years have seen rapid progress in the
arXiv Quantum Physics
arXiv:2604.06565v1 Announce Type: new
Abstract: Robust continuous-variable (CV) quantum information processing requires correcting realistic errors in bosonic systems, but all existing schemes rely on auxiliary Gottesman-Kitaev-Preskill (GKP) states which the preparation and operation are demanding
arXiv Quantum Physics
arXiv:2604.06574v1 Announce Type: new
Abstract: The purpose of this paper is to investigate the coherent feedback $H^\infty$ control problem for linear quantum systems. A key contribution is a simplified design methodology that guarantees closed-loop stability and a prescribed level of disturbance
arXiv Quantum Physics
arXiv:2604.06578v1 Announce Type: new
Abstract: Grover's algorithm searches for data satisfying a desired condition in an unstructured database. This algorithm can search a space of size $N$ in $\sqrt{N}$ queries, thereby achieving a quadratic speedup. However, within the Grover oracle circuit that
arXiv Quantum Physics
arXiv:2604.06584v1 Announce Type: new
Abstract: A particular type of linear optical multiport, the Grover four-port, has previously been shown to couple the spatial symmetry of a photon to its direction of travel. It is shown here that use of a nonstandard choice of qubit, based on symmetry, allows
arXiv Quantum Physics
arXiv:2604.06604v1 Announce Type: new
Abstract: Magic states play an important role in fault-tolerant quantum computation, and so the quantification of magic for quantum states is of great significance. In this work, we propose two new magic quantifiers by introducing two versions of quantum $(\alp
arXiv Quantum Physics
arXiv:2604.06606v1 Announce Type: new
Abstract: We present an enhanced entangled quantum clock protocol that incorporates a quantum phase estimation algorithm to directly estimate proper-time differences as an unknown phase. By employing highly entangled multi-clock states, the achievable uncertain
arXiv Quantum Physics
arXiv:2604.06639v1 Announce Type: new
Abstract: Shor's algorithm outperforms its classical counterpart in efficient prime factorization. We explore the coherence and entanglement dynamics of the evolved states within Shor's algorithm, showing that the coherence in each step relies on the dimension
arXiv Quantum Physics
arXiv:2604.06669v1 Announce Type: new
Abstract: Quantum target ranging, which estimates a target position using entangled photon pairs, is known to offer an error-probability advantage over classical ranging strategies. Yet, realizing this advantage in practice remains challenging, as an existing r
arXiv Quantum Physics
arXiv:2604.06679v1 Announce Type: new
Abstract: Optical loss is a common bottleneck in photonic quantum information processing, undermining the quantum advantage over classical approaches. Although several countermeasures, such as quantum distillation and error correction, have been proposed, they
arXiv Quantum Physics
Perturbative hydrogenic Lamb shifts and radiative decay rates -- an so(4,2)-based algebraic approach
arXiv:2604.06806v1 Announce Type: new
Abstract: It is shown that algebraic techniques based on the Lie algebra so(4,2) provide efficient tools for evaluating Lamb shifts and radiative decay rates for hydrogenic energy eigenstates as they systematically exploit the intrinsic symmetry of the hydrogen
arXiv Quantum Physics
arXiv:2604.06866v1 Announce Type: new
Abstract: We propose a hardware efficient quantum residual neural network which implements residual connections through a deterministic linear combination of identity and variational unitaries, enabling fully differentiable training. In contrast to the previous
arXiv Quantum Physics
arXiv:2604.06891v1 Announce Type: new
Abstract: The quantum nature of gravity remains experimentally unverified, despite recent proposals to probe it using tabletop experiments such as gravity-mediated entanglement schemes. In parallel, consistent formulations of classical--quantum dynamics have be
arXiv Quantum Physics
arXiv:2604.06908v1 Announce Type: new
Abstract: Most quantum divergences derive their structure from classical f-divergences or Renyi-type constructions, a dependence that obscures several quantum geometric effects. We introduce a quantum relative-alpha-entropy that extends Umegaki's relative entro
arXiv Quantum Physics
arXiv:2604.06931v1 Announce Type: new
Abstract: Free-space optical (FSO) links supporting spatial multiplexing provide a natural physical realization of Quantum MIMO channels. We develop a first-principles model for Quantum MIMO channels derived directly from wave-optical propagation through three-
arXiv Quantum Physics
arXiv:2604.06984v1 Announce Type: new
Abstract: Chip integration of quantum emitters is a crucial milestone for scalable quantum photonic information processing. Among optically active defect centers for quantum photonics, diamond color centers are promising because of their long spin coherence tim
arXiv Quantum Physics
arXiv:2604.07013v1 Announce Type: new
Abstract: Designing quantum neural networks (QNNs) that are both accurate and deployable on NISQ hardware is challenging. Handcrafted ansatze must balance expressivity, trainability, and resource use, while limited qubits often necessitate circuit cutting. Exis
arXiv Quantum Physics
arXiv:2604.07074v1 Announce Type: new
Abstract: We demonstrate complete coherent control of a single spin qubit confined in a self-assembled InAs negatively charged quantum dot subjected to an Oblique magnetic field, and directly compare this regime with the conventional Voigt geometry. In the Obli
arXiv Quantum Physics
arXiv:2604.07078v1 Announce Type: new
Abstract: The study of stronger-than-quantum phenomena (i.e., postquantum) has enabled a deeper understanding of the scope of quantum theory. Much is known about the case of correlations in Bell scenarios, where the device-independent framework allowed us to ex
arXiv Quantum Physics
arXiv:2604.07087v1 Announce Type: new
Abstract: The Holevo limit bounds the channel capacity of a communication channel in which information is encoded in quantum states in a Hilbert space at the transmitter and decoded using quantum measurements at the receiver. Saturating the Holevo limit require
arXiv Quantum Physics
arXiv:2604.07107v1 Announce Type: new
Abstract: We demonstrate the experimental realization of two-dimensional, continuous variable (CV) cluster states between 191 microwave frequency modes. This result is obtained by exposing vacuum fluctuations to the input of a Josephson Parametric Amplifier, pa
arXiv Quantum Physics
arXiv:2604.07156v1 Announce Type: new
Abstract: Grouping-based measurement strategies are widely used to reduce measurement complexity in near-term quantum algorithms. While these schemes have typically produced disjoint groups, recently this has been relaxed in what is known as overlapped grouping
arXiv Quantum Physics
arXiv:2604.07163v1 Announce Type: new
Abstract: Implementing high-fidelity controlled two-qubit gates in dipole-dipole interacting systems, such as rare-earth-ion crystals, in hindered by spectral inhomogeneity and weak coupling. Existing method often rely on detuned pulses, making them susceptible
arXiv Quantum Physics
arXiv:2604.07178v1 Announce Type: new
Abstract: The computational complexity of $\mathsf{QAC}^0$, which are constant-depth, polynomial-size quantum circuit families consisting of arbitrary single-qubit unitaries and $n$-qubit generalized Toffoli gates, has gained tremendous focus recently.
In thi
arXiv Quantum Physics
arXiv:2604.07214v1 Announce Type: new
Abstract: Gibbs state preparation is an important subroutine in quantum computing. In this work we use the detectability lemma to improve Gibbs state preparation. Specifically, we design new Gibbs state preparation methods that do not rely on simulating Lindbla
arXiv Quantum Physics
arXiv:2604.07235v1 Announce Type: new
Abstract: The deterministic generation and SWAP of Fock states in isolated high-Q modes form a core foundation for architectures in bosonic quantum computing. Conventionally, these operations necessitate strong coupling to a qubit, which inherently compromises
arXiv Quantum Physics
arXiv:2604.07257v1 Announce Type: new
Abstract: Quantum-state texture is a recently proposed quantum resource that characterizes the inhomogeneity of a quantum state's matrix element distribution in the computational basis, enriching our understanding of quantum state structure. To expand its quant
📰 Quantum News
No articles in this category for the past 7 days.
🔬 Research Papers
Nature Quantum
Nature Quantum
arXiv Quantum Physics
arXiv:2604.06270v1 Announce Type: new
Abstract: Efficient data encoding is the main factor affecting how fast hybrid quantum-classical algorithms run, but traditional simulators spend most of their time changing classical features into quantum rotations. This work introduces Hybriqu Encoder, a Rust
arXiv Quantum Physics
arXiv:2604.06303v1 Announce Type: new
Abstract: We study the protocol of entanglement harvesting when two local probes couple to the vacuum of a real scalar quantum field with arbitrary temporal profiles. We use a Hermite expansion to efficiently compute smeared field propagators in closed-form, re
arXiv Quantum Physics
arXiv:2604.06319v1 Announce Type: new
Abstract: Quantum computer hardware is predicted to scale over hundreds of thousands of qubits coming online in the next decade. Despite significant theoretical and experimental QEC progress, quantum computer architecture has suffered a significant gap, with bo
arXiv Quantum Physics
arXiv:2604.06322v1 Announce Type: new
Abstract: General relativity and quantum mechanics are incompatible at the Planck scale. This contention can be examined if a quantum computer is set to operate at a rate that exceeds the classical limit of one operation per Planck volume-time, or equivalently
arXiv Quantum Physics
arXiv:2604.06325v1 Announce Type: new
Abstract: We study the task of lifting arbitrary quantum states and channels to purifications and Stinespring dilations, respectively, in both the probabilistic exact and deterministic approximate settings. We formalize this task through a general framework of
arXiv Quantum Physics
arXiv:2604.06410v1 Announce Type: new
Abstract: Radiative coupling between quantum emitters leads to a range of spectacular emission phenomena. Dicke studied the foundations of collectively enhanced and suppressed decay, commonly referred to as super- and subradiance. Collective effects can further
arXiv Quantum Physics
arXiv:2604.06412v1 Announce Type: new
Abstract: Complex numbers are central to the formulation of quantum mechanics, yet their role as a genuine resource is only beginning to be understood. In this work, we demonstrate that quantum states with intrinsically complex amplitudes provide a fundamental
arXiv Quantum Physics
arXiv:2604.06450v1 Announce Type: new
Abstract: A basic model is provided that places active, intentional choices by biological organisms on a solid physical footing. The model is provisionally called "Agent Choice via Quantum Flux." It brings to bear specific physics on living systems in a way tha
arXiv Quantum Physics
arXiv:2604.06455v1 Announce Type: new
Abstract: We develop a dissipative extension of classical mechanics based on a complex, and more generally quaternionic, action principle that endows every classical system with an intrinsic environment. Decomposing the action into conservative and divergence-i
arXiv Quantum Physics
arXiv:2604.06457v1 Announce Type: new
Abstract: Although quantum random number generators rely on the inherent indeterminism of quantum mechanics, ensuring that the numbers produced are secure remains a significant challenge. We introduce two semi-device-independent randomness expansion protocols i
arXiv Quantum Physics
arXiv:2604.06461v1 Announce Type: new
Abstract: We introduce a systematic protocol for constructing quantum Hilbert-space-fragmented Hamiltonians, whose Krylov-sector structure, unlike in classically fragmented models, can be fully resolved only in an entangled basis. The protocol takes as input a
arXiv Quantum Physics
arXiv:2604.06466v1 Announce Type: new
Abstract: We unite two of the most widely used approaches for strongly damped, non-Markovian open quantum dynamics, the Hierarchical Equations of Motion (HEOM) and the pseudomode method by proving two statements: First, every physical bath correlation function
arXiv Quantum Physics
arXiv:2604.06523v1 Announce Type: new
Abstract: Quantum operations on pure states can be fully represented by unitary matrices. Variational quantum circuits, also known as quantum neural networks, embed data and trainable parameters into gate-based operations and optimize the parameters via gradien
arXiv Quantum Physics
arXiv:2604.06528v1 Announce Type: new
Abstract: The field of high-dimensional quantum photonics involves the use of multimode photonic degrees-of-freedom such as the spatial, temporal, or spectral structure of light to encode multi-level quantum states. Recent years have seen rapid progress in the
arXiv Quantum Physics
arXiv:2604.06565v1 Announce Type: new
Abstract: Robust continuous-variable (CV) quantum information processing requires correcting realistic errors in bosonic systems, but all existing schemes rely on auxiliary Gottesman-Kitaev-Preskill (GKP) states which the preparation and operation are demanding
arXiv Quantum Physics
arXiv:2604.06574v1 Announce Type: new
Abstract: The purpose of this paper is to investigate the coherent feedback $H^\infty$ control problem for linear quantum systems. A key contribution is a simplified design methodology that guarantees closed-loop stability and a prescribed level of disturbance
arXiv Quantum Physics
arXiv:2604.06578v1 Announce Type: new
Abstract: Grover's algorithm searches for data satisfying a desired condition in an unstructured database. This algorithm can search a space of size $N$ in $\sqrt{N}$ queries, thereby achieving a quadratic speedup. However, within the Grover oracle circuit that
arXiv Quantum Physics
arXiv:2604.06584v1 Announce Type: new
Abstract: A particular type of linear optical multiport, the Grover four-port, has previously been shown to couple the spatial symmetry of a photon to its direction of travel. It is shown here that use of a nonstandard choice of qubit, based on symmetry, allows
arXiv Quantum Physics
arXiv:2604.06604v1 Announce Type: new
Abstract: Magic states play an important role in fault-tolerant quantum computation, and so the quantification of magic for quantum states is of great significance. In this work, we propose two new magic quantifiers by introducing two versions of quantum $(\alp
arXiv Quantum Physics
arXiv:2604.06606v1 Announce Type: new
Abstract: We present an enhanced entangled quantum clock protocol that incorporates a quantum phase estimation algorithm to directly estimate proper-time differences as an unknown phase. By employing highly entangled multi-clock states, the achievable uncertain
arXiv Quantum Physics
arXiv:2604.06639v1 Announce Type: new
Abstract: Shor's algorithm outperforms its classical counterpart in efficient prime factorization. We explore the coherence and entanglement dynamics of the evolved states within Shor's algorithm, showing that the coherence in each step relies on the dimension
arXiv Quantum Physics
arXiv:2604.06669v1 Announce Type: new
Abstract: Quantum target ranging, which estimates a target position using entangled photon pairs, is known to offer an error-probability advantage over classical ranging strategies. Yet, realizing this advantage in practice remains challenging, as an existing r
arXiv Quantum Physics
arXiv:2604.06679v1 Announce Type: new
Abstract: Optical loss is a common bottleneck in photonic quantum information processing, undermining the quantum advantage over classical approaches. Although several countermeasures, such as quantum distillation and error correction, have been proposed, they
arXiv Quantum Physics
Perturbative hydrogenic Lamb shifts and radiative decay rates -- an so(4,2)-based algebraic approach
arXiv:2604.06806v1 Announce Type: new
Abstract: It is shown that algebraic techniques based on the Lie algebra so(4,2) provide efficient tools for evaluating Lamb shifts and radiative decay rates for hydrogenic energy eigenstates as they systematically exploit the intrinsic symmetry of the hydrogen
arXiv Quantum Physics
arXiv:2604.06866v1 Announce Type: new
Abstract: We propose a hardware efficient quantum residual neural network which implements residual connections through a deterministic linear combination of identity and variational unitaries, enabling fully differentiable training. In contrast to the previous
arXiv Quantum Physics
arXiv:2604.06891v1 Announce Type: new
Abstract: The quantum nature of gravity remains experimentally unverified, despite recent proposals to probe it using tabletop experiments such as gravity-mediated entanglement schemes. In parallel, consistent formulations of classical--quantum dynamics have be
arXiv Quantum Physics
arXiv:2604.06908v1 Announce Type: new
Abstract: Most quantum divergences derive their structure from classical f-divergences or Renyi-type constructions, a dependence that obscures several quantum geometric effects. We introduce a quantum relative-alpha-entropy that extends Umegaki's relative entro
arXiv Quantum Physics
arXiv:2604.06931v1 Announce Type: new
Abstract: Free-space optical (FSO) links supporting spatial multiplexing provide a natural physical realization of Quantum MIMO channels. We develop a first-principles model for Quantum MIMO channels derived directly from wave-optical propagation through three-
arXiv Quantum Physics
arXiv:2604.06984v1 Announce Type: new
Abstract: Chip integration of quantum emitters is a crucial milestone for scalable quantum photonic information processing. Among optically active defect centers for quantum photonics, diamond color centers are promising because of their long spin coherence tim
arXiv Quantum Physics
arXiv:2604.07013v1 Announce Type: new
Abstract: Designing quantum neural networks (QNNs) that are both accurate and deployable on NISQ hardware is challenging. Handcrafted ansatze must balance expressivity, trainability, and resource use, while limited qubits often necessitate circuit cutting. Exis
arXiv Quantum Physics
arXiv:2604.07074v1 Announce Type: new
Abstract: We demonstrate complete coherent control of a single spin qubit confined in a self-assembled InAs negatively charged quantum dot subjected to an Oblique magnetic field, and directly compare this regime with the conventional Voigt geometry. In the Obli
arXiv Quantum Physics
arXiv:2604.07078v1 Announce Type: new
Abstract: The study of stronger-than-quantum phenomena (i.e., postquantum) has enabled a deeper understanding of the scope of quantum theory. Much is known about the case of correlations in Bell scenarios, where the device-independent framework allowed us to ex
arXiv Quantum Physics
arXiv:2604.07087v1 Announce Type: new
Abstract: The Holevo limit bounds the channel capacity of a communication channel in which information is encoded in quantum states in a Hilbert space at the transmitter and decoded using quantum measurements at the receiver. Saturating the Holevo limit require
arXiv Quantum Physics
arXiv:2604.07107v1 Announce Type: new
Abstract: We demonstrate the experimental realization of two-dimensional, continuous variable (CV) cluster states between 191 microwave frequency modes. This result is obtained by exposing vacuum fluctuations to the input of a Josephson Parametric Amplifier, pa
arXiv Quantum Physics
arXiv:2604.07156v1 Announce Type: new
Abstract: Grouping-based measurement strategies are widely used to reduce measurement complexity in near-term quantum algorithms. While these schemes have typically produced disjoint groups, recently this has been relaxed in what is known as overlapped grouping
arXiv Quantum Physics
arXiv:2604.07163v1 Announce Type: new
Abstract: Implementing high-fidelity controlled two-qubit gates in dipole-dipole interacting systems, such as rare-earth-ion crystals, in hindered by spectral inhomogeneity and weak coupling. Existing method often rely on detuned pulses, making them susceptible
arXiv Quantum Physics
arXiv:2604.07178v1 Announce Type: new
Abstract: The computational complexity of $\mathsf{QAC}^0$, which are constant-depth, polynomial-size quantum circuit families consisting of arbitrary single-qubit unitaries and $n$-qubit generalized Toffoli gates, has gained tremendous focus recently.
In thi
arXiv Quantum Physics
arXiv:2604.07214v1 Announce Type: new
Abstract: Gibbs state preparation is an important subroutine in quantum computing. In this work we use the detectability lemma to improve Gibbs state preparation. Specifically, we design new Gibbs state preparation methods that do not rely on simulating Lindbla
arXiv Quantum Physics
arXiv:2604.07235v1 Announce Type: new
Abstract: The deterministic generation and SWAP of Fock states in isolated high-Q modes form a core foundation for architectures in bosonic quantum computing. Conventionally, these operations necessitate strong coupling to a qubit, which inherently compromises
arXiv Quantum Physics
arXiv:2604.07257v1 Announce Type: new
Abstract: Quantum-state texture is a recently proposed quantum resource that characterizes the inhomogeneity of a quantum state's matrix element distribution in the computational basis, enriching our understanding of quantum state structure. To expand its quant
🏭 Industry News
The Quantum Insider
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 venture-stage companies f
The Quantum Insider
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 update call. The Company
The Quantum Insider
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) cargo mission. The upg
The Quantum Insider
Insider Brief PRESS RELEASE — Horizon Quantum Holdings Ltd. (“Horizon Quantum”), a pioneer of software infrastructure for quantum applications and IonQ — the world’s leading quantum platform company — today announced a strategic agreement. Horizon Quantum will purchase one of IonQ’s first 6th-
The Quantum Insider
Insider Brief PRESS RELEASE — SuperQ Quantum Computing Inc. (“SuperQ Quantum”, “SuperQ”, or the “Company”) (CSE: QBTQ; OTCQB: QBTQF; Frankfurt: 25X), a leader in sovereign quantum-safe infrastructure and AI-orchestrated cybersecurity, today announced it has joined forces with Quantum
The Quantum Insider
The Vanderbilt Quantum Forum is bringing together leaders from academia, industry, government, and national laboratories to examine the near-term implications of quantum technology across energy, security, healthcare and economic competitiveness. A livestream of the event will be held from 9 a.m.–6:
The Quantum Insider
Insider Brief PRESS RELEASE — QNu Labs (www.qnulabs.com), a global leader in end-to-end hybrid quantum cybersecurity solutions, has announced the findings of a research study conducted in association with VIAVI Solutions, a global leader in network test and measurement. The study leverage
The Quantum Insider
Insider Brief PRESS RELEASE —  Qoro has announced the close of its pre-seed funding round, securing $750,000 USD to build the missing software layer for hybrid quantum-classical computing. The round includes backing from UK-based Ada Ventures, European early-stage investor 
The Quantum Insider
Insider Brief Yaqumo Inc. (Headquarters: Chiyoda-ku, Tokyo; CEO: Kazuhiro Nakashoji), a startup developing scalable neutral-atom quantum computers, announced today that it has raised a Seed Extension Round from Quantonation II FPCI (“Quantonation”), the world’s largest venture capital fu
The Quantum Insider
Insider Brief PRESS RELEASE — Quantum bits, or qubits, which are required for building quantum computers, come in different kinds. In recent years, many research institutes and companies have focused on superconducting circuits and trapped ions. However, neutral atoms trapped with laser light
Quantum Computing Report
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 a distance-5 (d5) ro
Quantum Computing Report
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 commercial strategy and s
Quantum Computing Report
QuantumDiamonds GmbH, the Munich-based specialist in diamond-based quantum sensing, has successfully installed its first QD m.1 system in the United States at Eurofins EAG Laboratories in Sunnyvale, California. This deployment marks a significant transition for the company from its initial product l
Quantum Computing Report
Cloudflare has officially updated its post-quantum (PQ) security roadmap, shifting its target for full system-wide resilience to 2029. This acceleration is driven by recent and unexpected advancements in quantum factoring efficiency, which suggest that the window for migrating global internet infras
Quantum Computing Report
Quantum XChange has announced the release of the Phio TX® Centralized Management Console (CMC), a platform designed to provide unified oversight and administrative control over quantum-safe key delivery across distributed networks. The CMC is an expansion of the company’s flagship Phio TX platform,
Quantum Computing Report
The National Quantum Mission (NQM) has reached a pivotal technical landmark with the successful demonstration of a 1,000-km quantum communication network, one of the longest in the world. Announced by Union Minister for Science & Technology Dr. Jitendra Singh during a review of the Department of
Quantum Computing Report
SuperQ Quantum Computing Inc. (CSE: QBTQ) has joined the Quantum Security Defence (QSECDEF) alliance, an international ecosystem focused on securing critical infrastructure against quantum-enabled threats. This integration comes as global pressure for Post-Quantum Cryptography (PQC) migration intens
Quantum Computing Report
Equal1 and Q-CTRL have announced a partnership to integrate Boulder Opal Scale Up infrastructure software into Equal1’s silicon-based quantum computers. This integration is designed to automate the calibration and "boot-up" sequences of the Bell-series systems, aiming to remove the requirement for m
Quantum Computing Report
Multipeak Global and RAQS Quantum have entered into a strategic collaboration aimed at translating quantum and quantum-inspired computing research into industrial applications. Based in Singapore, the partnership focuses on deploying "quantum-ready" solutions across the Asian and European markets. B
Quantum Computing Report
QBoson, a Beijing-based developer of photonic quantum hardware, has closed a Series B funding round totaling CNY 1 billion ($145 million). The capital injection was jointly led by a consortium of state-supported and institutional investors, including Beijing Financial Holdings Group, ICBC Capital, B