October 15, 2026

A low-cost compact muon detector for millikelvin operationTier 3

Ionizing radiation produces correlated errors in superconducting qubits, posing some challenges to quantum error correction. In addition, it causes background events in other superconducting cryogenic devices, such as kinetic inductance detectors and superconducting nanowire single-photon detectors. Cosmic muons are a component of this background that can only be partly shie...

Dynamical Decoupling of Nonclassical States in a Biased-Noise Spin QuditTier 3

Encoding quantum information in d-dimensional systems (qudits) with d>2 offers appealing new directions for resource-efficient quantum computing. However, protecting the coherence of nonclassical qudit resource states remains an open challenge. Dynamical decoupling (DD) is a well-established technique for extending coherence, but its application to qudits is hindered by...

Riverlane and NVIDIA Demonstrate Accelerated QEC Decoder Calibration Using GPU ProcessingTier 2

Riverlane and NVIDIA have demonstrated significant acceleration in quantum error correction (QEC) decoder recalibration using NVIDIA's H100 GPU. By adapting Riverlane's Local Clustering Decoder for GPU processing, they achieved up to 71x raw throughput gain and reduced training epochs from minutes to seconds. This advancement allows for more frequent and efficient recalib...

Previously: 2026-09-16, 2026-09-15, 2026-09-12

Riverlane and NVIDIA Use AI to Speed Up Quantum Decoder CalibrationTier 2

Insider Brief PRESS RELEASE — Quantum computing has the potential to solve problems beyond the reach of today’s computers, from drug discovery to materials science and optimisation. But before that can happen, the industry must first overcome the errors that are created by quantum computing’s extreme sensitivity to noise. Quantum error correction (QEC...

Previously: 2026-09-16, 2026-09-15, 2026-09-12

FirstQFM Model Cuts Single-Qubit Gate Times by 33% on QuantWare ProcessorTier 2

Insider Brief PRESS RELEASE — FirstQFM today announced results from applying FirstQFM’s quantum foundation model to a QuantWare superconducting quantum processor at the Israeli Quantum Computing Center (IQCC). FirstQFM’s foundation model builds on top of Quantum Machines’ native calibration stack, and generated single-qubit gates that reduced execution time by 33% on a...

Petz Recovery through a Single Polar Transformation for Approximate Quantum Error CorrectionTier 3

The Petz recovery map provides a near optimal decoder for approximate quantum error correction, but its inverse square-root normalization complicates circuit implementation. We use the polar structure of the Petz recovery isometry to implement recovery through a single quantum singular value transformation (QSVT). We give explicit block-encoding circuits and an extended reco...

Quantum Folding in Chebyshev-Based Quantum Subspace DiagonalizationTier 3

Quantum subspace diagonalization (QSD) with a Krylov space spanned by Chebyshev polynomials of the Hamiltonian is a natural ground-state method for fault-tolerant quantum computers, but every guarantee it offers---convergence rate, noise floor, and the cost of turning its classical output back into a physical state---is controlled by the overlap of the reference state with t...

Tomography for coherent noiseTier 3

Coherent noise poses a fundamentally greater challenge to quantum error correction than independent s- tochastic Pauli errors, because unitary errors preserve interference between error paths, can accumulate over multiple quantum error correction rounds, and leave the encoded logical channel with a residual coherent com- ponent. If the parameters of such coherent noise can b...

Geometric-resource bounds and permutation-averaged success probabilities for the WZP algorithmTier 3

Solving linear systems of equations is a fundamental task in machine learning and optimization. In this work, we extend the original WZP algorithm from real symmetric linear systems to complex Hermitian linear systems. We then study the success probability of the modified WZP algorithm from a resource-theoretic perspective. By expressing the postselection success probability...

Pinning of a High-Energy Wavepacket by a Single ImpurityTier 3

We demonstrate that a single repulsive impurity enhances directional confinement of a high-energy wavepacket in a finite two-dimensional lattice of quantum wells. At energies far above the interwell barriers, the impurity suppresses transverse dynamical tunneling while preserving propagation along a principal lattice axis, even as the corresponding classical regular region s...

Shot- and Noise-Aware Pauli Correlation Encoding for Max-Cut Experiments on IBM Heron Quantum ProcessorTier 3

Pauli correlation encoding (PCE) encodes m binary variables in the signs of k-body Pauli correlators of n=O(m^(1/k)) qubits, and trains a parameterized circuit on a relaxed loss of sharpness α. The strongest published schedules sharpen this loss aggressively and are benchmarked with exact expectation values, whereas a quantum computer estimates correlators from a fin...

EigenOrbit Releases Open-Source eigenkit 1.0 for Multi-Backend Quantum ExecutionTier 2

EigenOrbit has released eigenkit 1.0, an open-source Python library. It allows quantum algorithms to be written once and executed across multiple simulators and hardware backends without code modification. The library integrates with various classical simulators and QPU hardware access points, including machine learning and cost tools.

Dicke model of open-shell atoms with tensor polarizabilityTier 3

We study the extended Dicke model obtained from the scalar--vector--tensor polarizability of open-shell atoms coupled to a shared cavity mode. For a single electric-dipole channel, rotational symmetry fixes the tensor to vector ratio; we use ^(168)Er with J=6 as a product-state example. A circular pump produces a chiral Raman vertex whose tensor-dependent matrix...

Retrieving Metrological Information from Noisy Squeezed Spin States via Bayesian OptimizationTier 3

Frequency inhomogeneity can obscure the metrological advantage of squeezed spin states, making the choice of readout crucial. We study interacting spin-1/2 ensembles with static local frequency disorder and optimize a common collective readout over independent disorder realizations. Using Bayesian optimization of the full measurement-outcome distribution, we identify observa...

Silicon Quantum Computing Traces 25-Year Roadmap to Atomic-Precision Manufacturing in Nature NanotechnologyTier 2

Silicon Quantum Computing (SQC) has detailed a 25-year roadmap in Nature Nanotechnology for developing atomic-scale processors. The article traces the evolution of phosphorus-in-silicon quantum processors from single-atom transistor demonstrations to commercial atomic-scale products. Key milestones include the development of automated atomic-precision fabrication, achieve...

Infleqtion Secures £9 Million ($12 Million USD) Innovate UK Award to Transition Rydberg Quantum RF Sensing to Operational DeploymentTier 2

Infleqtion has secured a £9 million Innovate UK award to advance its Quantum Radio Frequency (QRF) direction-finding system, Quantum Spectrum-DF. This funding, part of the Quantum Missions Primer program, supports the transition of the Rydberg-atom-based system from prototype to operational deployment. Developed with Leonardo, the technology uses optical techniques for br...

ORCA Computing Launches PT-3, The Latest Generation of Its Photonic Quantum ComputersTier 2

Insider Brief PRESS RELEASE — ORCA Computing, the company pioneering quantum-accelerated AI for science, today launches the PT-3, the newest generation of its photonic quantum computers, and the first built to deliver commercial quantum advantage. The first system is live in the Digital Realty Innovation Lab (DRIL) in London, where it runs alongside NVIDIA accelerated...

New York City and NYU Partner to Launch $284 Million Quantum Fabrication FacilityTier 2

New York City and NYU are partnering to launch the $284 million Quantum Fabrication Facility (QFab) at 770 Broadway, set to open in 2030. The facility will focus on quantum chip development and aims to foster startups, provide fabrication services, and support workforce development through CUNY and NYC Public Schools. This initiative features a unique public-equity model,...

IonQ Announces Pricing of $2.0 Billion Equity Offering Purchased by Heights Capital ManagementTier 2

IonQ announced a $2.0 billion equity offering purchased by Heights Capital Management, consisting of common stock and pre-funded warrants priced at a 15% premium. The deal also includes seven-year warrants for additional shares at a 100% premium. IonQ plans to use the capital to accelerate the commercialization and deployment of its quantum platform.

Bloq Quantum Launches Bloq Maya AI Agent to Streamline Enterprise Quantum Algorithm DevelopmentTier 2

Bloq Quantum has launched Bloq Maya, an agentic AI assistant that streamlines enterprise quantum algorithm development. It automates circuit design, algorithm formulation, and code generation, converting high-level requirements into executable quantum code and models. Bloq Maya aims to reduce development timelines for corporate R&D across various industries. T...

Loss-Tolerant Measurement-Device-Independent QKD over Untrusted Repeaters via High-Dimensional Time-Bin MultiplexingTier 3

We propose a loss-tolerant measurement-device-independent quantum key distribution (MDI-QKD) protocol using time-bin-multiplexed single photons entangled with local qubits stored in nitrogen-vacancy (NV) centers. In each round, Alice and Bob each send a single multiplexed photon to an untrusted intermediary, Charlie. Each photon first becomes entangled with Charlie's NV-cent...

Preservation of photon statistics upon selective molecular modulation in hollow-core fibersTier 3

Preserving the underlying statistical properties of light during frequency transduction is essential for interfacing spectrally disparate quantum systems. To do this successfully, the process needs to be highly efficient, broadband and noiseless. Despite significant progress in this field, satisfying all these conditions remains challenging. Recently, molecular modulation-ba...

Quantum-Aware Key Rank for Side-Channel Attacks evaluationTier 3

Side-channel attacks on block ciphers rarely recover the key outright: they leave a residual key space ordered by subkey posteriors, and evaluation laboratories report the key rank of the true key against thresholds near 2^48 and 2^60. No evaluation framework models an adversary who collects traces classically and finishes the search on a quantum computer, although quantum s...

Intermediate memory costs of quantum channel synthesis with a protected subsystemTier 3

A quantum memory can preserve a subsystem perfectly while discarding information needed by a later operation. We study the total intermediate dimension required for channel synthesis when the first stage protects a b-dimensional subsystem and has a prescribed noncommutative graph imposing full confusability on an a-dimensional control register. For a finite family of cla...

Demonstration of a mobile ion-trap quantum deviceTier 3

Trapped-ion devices are being investigated for transportable applications, including the transfer of exotic charged particles between laboratories and the development of portable quantum technologies. To date, ion transport has been demonstrated only in magnetic (Penning) traps, whereas radiofrequency (Paul) traps are the predominant platform in quantum science. Here, we rep...

Quantum Spectral Estimation with Multiple Initial States: Improved Error and Cost ScalingTier 3

We study quantum spectrum and eigenstate property estimation using multiple initial states and generalized Hadamard tests. Building on the QFAMES (quantum filtering and analysis of multiplicities in eigenvalue spectra) framework, we introduce a new method that samples evolution times independently for each initial-state pair. Under the stated assumptions, when statistical er...

Universal enhancement of the pairing gap in a dilute Fermi superfluidTier 3

At zero temperature, a dilute Fermi gas with an attractive contact interaction forms a superfluid with gapped fermionic excitations. We show that the gap at weak coupling can be organized as a trans-series expansion in the interaction strength and the asymptotic Gor'kov-Melik-Barkhudarov gap. Low-energy virtual quasiparticles generate corrections that are linear in the gap w...

Degeneracy graph determinants and higher-dimensional Young diagramsTier 3

Kemp and Ramgoolam proposed a basis of monomials for a commutative semisimple algebra with generators C_1,…, C_L, constructed from a degeneracy graph which records how the eigenspaces of C_1 are successively split by C_2,…, C_L. They showed that the basis property is equivalent to the non-vanishing of the determinant of the matrix of values of these m...

Gaussian and Qubit Semigroup Dynamics beyond GKSLTier 3

A well established approach to describe open quantum system dynamics is the celebrated Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) master equation. In this article we aim to shed light on semigroup dynamics that are not of this form. Such dynamics may appear in real physical systems describing asymptotic long-time dynamics. Thus, they correspond to semigroup dynamics applic...

A hybrid quantum interferometer bridging Hong-Ou-Mandel and N00N-state interferenceTier 3

Hong-Ou-Mandel (HOM) interference offers robustness in high-noise environments due to its phase-insensitive nature, while N00N-state interference provides enhanced phase sensitivity for precision measurements in low-noise settings. However, their realizations have typically required separate experimental platforms. Here, we report a single hybrid quantum interferometer that...

Quantized six-vertex realizations of frustration graphsTier 3

A recent graph-theoretic criterion for a Hamiltonian to exhibit a free-parafermion spectrum is that its frustration graph be an indifference graph. We show that an arbitrary finite indifference graph can be realized as a frustration graph of the quantized six-vertex model at odd roots of unity, by a suitable choice of the defining wiring diagram and parameters. This provides...

Directional effects of the Unruh effect on steering harvestingTier 3

We investigate directional quantum steering harvesting by two uniformly accelerated non-identical Unruh-DeWitt detectors coupled to a massless scalar field in the Minkowski vacuum. We show that the Unruh effect does not simply degrade harvested steering, but can reshape its directionality in a strongly parameter-dependent manner. At low detector energy scales, acceleration p...

Strong subadditivity of topological entropy on the torus: Rényi order and non-Abelian structureTier 3

We classify strong subadditivity for the canonical topological Rényi functional at finite positive orders on an unpunctured torus in the topological quantum field theory of any finite unitary modular tensor category. Universal validity means validity for all pure ground states and all regular region pairs with transverse or disjoint boundaries and compatible corner rounding....

Advances in quantum optomechanical control based on cavity cold-atom systemsTier 3

Cavity optomechanics represents a frontier research direction in quantum science and technology, centered on the control and exploration of interactions between electromagnetic fields and mechanical motion. Rooted in quantum mechanics, this field realizes efficient coupling and precise manipulation of optical fields and mechanical vibrations through the structural design and...

Metric-Changing Quasi-Hermitian Quenches: Normalized Loschmidt Amplitude and Complex-Time ZerosTier 3

In quasi-Hermitian mixed-state quenches, the initial and final Hamiltonians generally possess different positive-definite metrics, so post-quench evolution is not quasi-unitary in the initial physical space. Choosing the preparation/measurement space as reference, we derive from first principles a normalized mixed-state Loschmidt amplitude using metric-compatible purificatio...

Multi-Instantons and Exact-WKB Stokes Jumps in Multi-Well Quantum MechanicsTier 3

We study the relation between the exact-WKB Delabaere--Dillinger--Pham Stokes jumps and the multi-instanton expansion of a one-dimensional potential with N equal-depth minima. For a single barrier this relation is the Bogomolny--Zinn-Justin cancellation between the instanton--anti-instanton ambiguity and the Borel ambiguity of perturbation theory, and we extend it to every...

Hyperentanglement in intermediate phase-space planes: benchmarking a photon-pair source for quantum key distributionTier 3

We characterize a source of photon pairs simultaneously entangled in polarization and in the transverse spatial degree of freedom, with the spatial measurements performed in intermediate planes of the fractional Fourier transform. The source consists of two crossed type-I crystals in a non-collinear geometry, such that the transverse variables carry information about the cry...

Testing graph isomorphism using simple quantum circuitsTier 3

The graph isomorphism problem asks whether two graphs are equivalent up to a permutation of their vertices. Its precise computational complexity remains unresolved, and it is still unknown whether a polynomial-time algorithm exists. We investigate whether simple graph-dependent Instantaneous Quantum Polynomial-time (IQP) and Quantum Approximate Optimisation Algorithm (QAOA)...

Observation of correlations beyond the single-particle picture in fermionic counting statisticsTier 3

The analysis of charge fluctuations in a mesoscopic device can shed light on the fundamental question of whether or not a single-particle picture of electron transport is appropriate, even in the presence of Coulomb interaction. It has been shown on general grounds that mapping the interacting system onto a fermionic single-particle description is subject to strict constrain...

Joint-measurement advantage and finite-time transitions in accelerated detector registersTier 3

The Unruh response thermalizes accelerated detectors, but the entanglement remaining in a register does not by itself specify what distributed measurements can recover. We study this distinction for a four-qubit cluster state whose two assisting nodes independently undergo generalized amplitude damping, while the target nodes remain isolated and the environments are inaccess...

Photon Demultiplexing Using Spatial RoutingTier 3

Spatial sectioning of the far-field noncollinear field from spontaneous parametric down-conversion (SPDC) is a promising approach for multiparty quantum communication. Although demonstrations with six pairs of users have been reported, the fundamental limits remain unknown. These include the maximum number of channels, the required degree of channel optimization, and the dep...

Majorana Edge Modes Reshape Kibble-Zurek Scaling in Kitaev Honeycomb RibbonsTier 3

Recent progress in programmable quantum simulators motivates exact benchmarks for nonequilibrium dynamics in topological quantum matter. We study the Kitaev honeycomb model driven through its critical regions by a linear ramp of the bond coupling J_z over a ramp time τ, comparing zigzag and armchair ribbons with fully periodic tubes. The production of excitations exhibit...

On the structure of low-rank PPT entangled states violating Peres conjectureTier 3

Bound-entangled states with positive partial transpose (PPT) can exhibit quantum steering and Bell nonlocality, disproving the long-standing Peres conjecture and its stronger steering counterpart. These counterexamples, obtained through explicit constructions or numerical searches, raise the question of whether they share a common structural origin. We address this question...

Single and coupled quantum van der Pol oscillators: Wigner-function dynamics, exact qutrit solutions, and synchronizationTier 3

We study quantum van der Pol oscillator in which single-photon pumping competes with a nonlinear two-photon dissipative channel to produce a quantum limit cycle, and the question of how two such oscillators with non-identical intrinsic frequencies synchronize in the sense of phase locking when coupled dissipatively to one another. For a single oscillator, starting from a Lin...

Trading energy for coherence in mode discriminationTier 3

Energy is arguably the main resource in classical physics; coherence is the prototypical quantum resource. In this paper, we study the interplay between these two resources in the task of optimal mode discrimination. This task, motivated by cryptography and metrology, consists of finding in which mode a signal has been encoded, for a given finite set of possible modes. After...

Acoustic scattering from quantum dynamicsTier 3

Scattering of sound waves propagating in a compressible fluid is linked to the quantum dynamics generated by a class of non-Hermitian Hamiltonian operators. The scattering amplitude is expressed in terms of the corresponding evolution operator. This is used to provide a new proof of the reciprocity theorem in acoustic scattering, conduct analytic low-frequency acoustic scatt...

Quantum-enhanced phase interrogation of a fiber-optic strain sensorTier 3

Fiber-optic sensors enable high-sensitivity measurements of various physical parameters. Here, we demonstrate a quantum-enhanced interrogation of an all-fiber-optic Fabry-Perot resonator, employing entangled two-photon interference to probe directly strain-induced optical phase shifts. The resonator is interrogated by a narrow-linewidth laser that is frequency-locked to its...

Void-Free Through-Glass Vias for Multilayer Surface-Electrode Ion TrapsTier 3

Through-substrate interconnects are a key technology for scaling surface-electrode ion traps (SEITs) toward large electrode counts and complex architectures. Dielectric substrates such as fused silica offer superior RF performance compared to silicon, but the reliable fabrication of void-free through-glass vias (TGVs) remains challenging. In this work, we demonstrate a SEIT...

Coherent-State Integrals Beyond the Domain of Operator ProductsTier 3

Inserting a resolution of the identity between two operators turns a matrix element of their product into a phase-space integral. For unbounded operators the product need not exist on the vector at hand, while the integral may still converge. We follow this gap through the chain e^(μa^2)e^(λa^(†2)) of two-photon exponentials, where it can be traced completely. Five r...

Transport Information Beyond Strong Eigenstate ThermalizationTier 3

Strong eigenstate thermalization (ETH) in operationally mean-ergodic, non-chaotic systems provides an opportunity to investigate whether Floquet eigenstates retain information about classical transport beyond their leading thermodynamic behavior. We address this question using the double kicked top (DKT), which exhibits nonmixing transport and dynamics consistent with weak m...

A Reconstruction of Michelson Interference from On--Off Detection StatisticsTier 3

This paper reconstructs the Michelson interference phenomenon based solely on the binary (on-off) statistics of a single-photon counter and macroscopic path-difference data, without the a priori assumptions of complex wave superposition or prior spectral information. In contrast to the conventional approach that assumes light as a continuous complex wave function and conside...

ZeroTier Releases RC3 of Quantum-Secure Networking PlatformTier 2

Insider Brief PRESS RELEASE — ZeroTier, one of the world’s top software-defined networking companies, today announced Release Candidate 3 (RC3) of ZeroTier Quantum, the world’s only software-defined end-to-end quantum-secure networking platform. The release marks the final production step towards full deployment, proving ZeroTier Quantum can deliver secure, quantum-saf...

Guest Post — Seeing Underground: Quantum Sensing in Mineral ExplorationTier 2

By Zeynep Koruturk, Dr. Kris Naudts, and Donald Harmitt @ Firgun Ventures. Firgun Ventures is a VC firm investing in Series A/B quantum scale-ups globally. Demand for critical minerals is rising just as copper exploration is becoming harder. The IEA projects copper supply to fall around 25% short of primary requirements by 2035, while the […]

NYC Awards $29.2 million to New York University to Establish a Cutting-edge Quantum Fabrication FacilityTier 2

Insider Brief PRESS RELEASE — Mayor Zohran Kwame Mamdani, Deputy Mayor for Economic Justice Julie Su and New York City Economic Development Corporation (NYCEDC) President and CEO Anthony Shorris announced the city will award $29.2 million to New York University to establish a cutting-edge Quantum Fabrication Facility (QFab), putting New York City at the front […]

Improved Quantum Algorithms for Rényi Entropies EstimationTier 3

Entropy estimation of discrete probability distributions is a fundamental problem in statistical inference and quantum property estimation. In this paper, we study the problem of estimating Rényi entropy H_α(p) for any distribution p = (p_i)_(i=1)^n given its purified quantum query-access. For non-integer α> 1, our algorithm estimates H_α(p)...

Quantum Work Statistics from Entanglement-Assisted InvarianceTier 3

We demonstrate that the one-time measurement scheme is more consistent than the standard two-time measurement scheme with respect to the fundamental symmetry of entanglement, namely entanglement-assisted invariance (envariance). In particular, the work statistics obtained from the one-time measurement scheme arise naturally as a direct consequence of envariance for any drivi...

SEALSQ to Showcase Post-Quantum Security Products at electronica 2026Tier 2

Insider Brief PRESS RELEASE — SEALSQ Corp (NASDAQ: LAES) (“SEALSQ” or “Company”), a company that focuses on developing and selling Semiconductors, PKI, and Post-Quantum technology hardware and software products, today announced its participation in electronica 2026, November 10 – 13, 2026 at Trade Fair Center Messe Munich, Germany. SEALSQ,...

Quantum LDPC Codes from Polynomial MinorsTier 3

We construct quantum codes from codewords of a cyclic code and the minors of a polynomial matrix. The construction uses a two-row, three-column matrix whose minors yield a second matrix satisfying the CSS orthogonality condition. We derive the code dimension from the greatest common divisors of the entries and minors, with a simplified formula for odd lifting factors. A resi...