October 23, 2026

NVIDIA Takes Strategic Stake in Riverlane to Accelerate Real-Time Quantum Error Correction and GPU Decoder CalibrationTier 2

NVIDIA has invested in Riverlane to advance real-time quantum error correction (QEC) and GPU decoder calibration. This collaboration utilizes NVIDIA H100 GPUs to accelerate Riverlane's Local Clustering Decoder (LCD), significantly reducing the time for surface code training cycles and enabling dynamic recalibration of QEC decoders. This advancement helps mitigate qubit dr...

Previously: 2026-10-20, 2026-10-19, 2026-10-13

Chalmers University Demonstrates TRIO Pulses for Control-Error-Robust Single-Qubit Gates in Superconducting ProcessorsTier 2

Chalmers University of Technology has developed TRIO pulses, a new quantum control framework for superconducting processors. These pulses enable single-qubit gates to maintain high fidelity even with significant control-amplitude miscalibrations and frequency detuning errors. This breakthrough offers a way to reduce recalibration overheads in large-scale quantum processor...

Iceberg Quantum Validates Pinnacle 1.2 Architecture with Crevasse QLDPC Decoder to Reduce RSA-2048 Factoring ResourcesTier 2

Iceberg Quantum's Pinnacle 1.2 architecture, featuring the Crevasse QLDPC decoder, significantly reduces the resources needed to factor RSA-2048. They achieved logical error rates below 10^-12 per logical qubit-cycle, a critical threshold for this task, through direct circuit-level simulations. This breakthrough could factor RSA-2048 in as little as 0.98 days with 48,000...

Screening strongly correlated materials in solid oxide cells with quantum simulationTier 3

We develop an end-to-end framework for assessing a quantum-computing application in industrial materials science: the screening of strongly correlated oxygen-electrode materials for SOFCs and SOECs. We formulate the materials problem in terms of interface observables including oxygen-vacancy formation energies, vacancy migration barriers, and electronic conductivity. We desc...

Nanopillar metasurfaces uniting high optical reflectivity with ultracoherent nanomechanicsTier 3

Mechanically compliant mirrors are key components in cavity optomechanics. However, the requirements to achieve the best optical and mechanical performance are usually in direct competition. A high reflectivity for tightly focused beams entails thick reflectors, whereas ultracoherent flexural nanomechanics necessitates thin membranes. We eliminate this trade-off by introduci...

The limits of magic-state distillationTier 3

Magic-state factories are a major cost of fault-tolerant quantum computing, yet how few noisy inputs they need is known only for restricted protocols. We show that, for tolerating input faults, any stabilizer protocol, however adaptive, postselected or multistage, is no better than a projection onto one stabilizer code, and that for rational targets a fault pattern is harmfu...

Noise redistribution by stabilizer codes: an organizing view of concatenated three-qubit codesTier 3

We present an organizing framework for concatenated quantum error correction based on the observation that the syndrome projection of a stabilizer code reshapes the noise channel in a code-determined manner. For any stabilizer code, one level of QEC maps the physical noise to a block-diagonal logical channel whose diagonal Pauli weights are fixed by the code geometry. Cohere...

All-photonic millimeter-wave and terahertz signal core at room and cryogenic temperaturesTier 3

Millimeter-wave and terahertz technologies offer new opportunities for high-capacity communications, sensing, and quantum systems, but electronic signal chains above 100 GHz are limited by weak sources, noisy receivers, and lossy interconnects. Photonic approaches mitigate these constraints by enabling chip-scale high-frequency components, yet existing implementations genera...

IQM and NVIDIA Automate 20-Qubit Chip Calibration via NVIDIA Ising Vision-Language Models and QCalEval BenchmarkTier 2

IQM Quantum Computers and NVIDIA have successfully automated the calibration of a 20-qubit quantum processor using NVIDIA Ising Vision-Language Models (VLMs). This agentic AI system analyzes experimental data, autonomously adjusts parameters, and generates diagnostic logs for human review. They also released QCalEval, an open benchmark for AI-driven quantum processor brin...

Previously: 2026-10-15, 2026-10-15, 2026-09-16

Qubits Are Not Enough: Deflation and Measurement Limits in Variational Quantum Modal AnalysisTier 3

Amplitude encoding stores an N-degree-of-freedom structural mode using ceiling(log2 N) qubits. This article develops an evaluation framework for variational quantum eigensolvers in finite-element structural dynamics. A Cholesky transformation maps the generalized eigenproblem to a symmetric mass-orthonormal Hamiltonian, ensuring Euclidean quantum-state orthogonality equals s...

Quantum Fokker-Planck solvers as trainable generative modelsTier 3

We develop and analyze generative models based on quantum solvers of stochastic differential equations. Unlike the common approach based on layered variational quantum circuits with parameterized rotations, we parameterize the potential of a Langevin process. The associated Fokker-Planck (FP) equations are Hermitianized and solved using a linear combination of cosine operato...

Can Entanglement-Induced Feature-Map Designs Improve Projected Quantum Kernels?Tier 3

Projected quantum kernels (PQKs) have emerged as a notable approach to circumvent the hardness of machine learning tasks arising from the exponential dimensionality of the quantum Hilbert space. However, recent PQK studies often rely heavily on extensive classical hyperparameter tuning of the radial basis function (RBF) kernel parameter and the support vector machine regular...

Reset-Enhanced Dissipative Quantum MetrologyTier 3

Quantum metrology is ultimately shaped not only by measurements, but also by the dissipative dynamics that prepare and maintain the probe. Nevertheless, a general mechanism for enhancing both steady-state and transient precision in open quantum systems has been lacking. Here we show that adding a simple reset channel provides such a mechanism: reset acts as a minimal dissipa...

On the Role of Problem Structure in Single-Layer QAOATier 3

Problem structure is regarded as a key factor influencing the performance of the Quantum Approximate Optimization Algorithm (QAOA), yet it remains an informal notion without a precise mathematical characterization. In this work, we address this issue by identifying a mathematical object that captures problem structure as seen from the perspective of the target state amplitud...

ArcTN: Efficient Tensor-Network Contraction Planning for Quantum Circuit SimulationTier 3

Tensor-network simulation of quantum circuits depends on contraction orders with low computational cost and small intermediate tensors, found without excessive planning time. We present ArcTN, a contraction-order optimization framework with two search presets. Light keeps planning overhead low, and Heavy spends more effort on refinement. Both combine randomized-greedy constr...

IBM Releases Qiskit SDK v2.6 with C API Pass-Manager Framework, Native QPY Serialization, and Custom OperationsTier 2

IBM Quantum has released Qiskit SDK v2.6, significantly enhancing its C API layer with a new pass-manager framework and native QPY serialization. This update allows for custom compiler passes and hardware-native quantum operations in C, C++, and Julia without a Python runtime, moving towards Python-optional execution in high-performance computing. The release also updates...

Previously: 2026-10-20, 2026-10-19, 2026-10-13

ZuriQ and Rhonexum Partner on Cryogenic Electronics for Quantum ComputingTier 2

Insider Brief PRESS RELEASE — ZuriQ and Rhonexum have announced a multi-year commercial framework agreement. Under the agreement, Rhonexum will supply cryogenic integrated-circuit technologies and customisation services to ZuriQ, which will evaluate the potential of each of these solutions to advance its trapped-ion quantum computing roadmap. This partnership brings to...

FVQKD: A Formal Verification of Quantum Key Distribution Security in RocqTier 3

Quantum key distribution (QKD), whose security is derived from quantum mechanics rather than computational assumptions, is moving into standardization and commercial deployment. Yet its security guarantees rest on technically delicate proofs checked by hand. Formal verification closes this gap, establishing a two-factor assurance: unconditional security from physical princip...

Brazil’s Inteli Becomes Accredited ICT and Partners with IBM Quantum to Research Decision-Making Under UncertaintyTier 2

Inteli, a Brazilian higher education institute, has become an accredited ICT and partnered with IBM Quantum. This collaboration grants Inteli researchers cloud access to IBM Quantum systems to explore quantum algorithms for decision-making under uncertainty, with a focus on practical industrial applications in Latin America. The partnership aims to advance quantum computi...

Quantinuum and Oracle Launch OCI Quantum AI Compute Beta Program for Early Access to HeliosTier 2

Quantinuum and Oracle have launched the OCI Quantum AI Compute Beta Program, offering early cloud-based access to Quantinuum's Helios quantum processor for hybrid quantum-AI workflows. This program integrates Helios within Oracle Cloud Infrastructure (OCI) AI data centers, providing a browser-based Python development environment for various applications. The initiative wi...

Previously: 2026-08-12

Quantum Beach 2026 — Official LivestreamTier 2

Join us online on October 22 as Quantum Beach 2026 brings researchers, entrepreneurs, investors and industry leaders to the Palm Beach County Convention Center in West Palm Beach, Florida. Explore the ideas, investments and partnerships shaping the quantum economy, from advances in quantum computing to the practical work of building businesses, preparing a skilled workforce...

Palm Beach Colleges Connect as Florida Launches Quantum-Safe NetworkTier 2

Insider Brief PRESS RELEASE — Palm Beach State College (PBSC) President Ava L. Parker, JD announced Wednesday night that the first segment of Florida’s statewide quantum-safe network is operational. The system links PBSC to Florida Atlantic University in Boca Raton over Palm Beach County’s dark fiber infrastructure. Supported by a $1 million defense infrastructur...

UK and Singapore Discuss Quantum Security and Post-Quantum CryptographyTier 2

Insider Brief PRESS RELEASE — The United Kingdom (UK) and Singapore held the 11th UK-Singapore Financial Dialogue in Singapore today. Reaffirming their strong and longstanding partnership, the discussions focused on advancing cooperation in digital finance and innovation, capital markets, sustainable finance, and regional and multilateral initiatives. Digital Finance a...

What does quantum parameter estimation estimate? A no-go result for true quantity valuesTier 3

We examine the conditions under which quantum parameter estimation is compatible with the concept of a ``true'' quantity value: a unique value of the estimated quantity that exists prior to and independently of measurement. While quantum parameter estimation typically assumes that the quantity to be estimated is a parameter, we argue that this assumption can be lifted, openi...

Mixed State Deep Thermalization under Generic Quantum ErrorsTier 3

Pure-state deep thermalization predicts that, after sufficient scrambling, projected ensembles approach universal distributions that contain information beyond the reduced density matrix. In realistic quantum systems, however, noise is unavoidable and the projected states are generally mixed. Whether mixed-state deep thermalization admits an analogous universal limiting dist...

Problem-aware sampling for bias and variance reduction in randomised Hamiltonian simulationTier 3

Randomised quantum simulation algorithms such as qDRIFT reduce circuit depth by replacing deterministic product formulas with stochastic compilations, but achieving high accuracy can require many steps. In vanilla qDRIFT, Hamiltonian terms are sampled with probabilities proportional to their coefficient magnitudes. We propose StateDRIFT, a variant of qDRIFT which optimises i...

The Impact of Markovian Errors on Random CircuitsTier 3

Randomized benchmarking (RB) returns a single decay parameter or gate error rate, but when the noise is gate-dependent that parameter is notoriously difficult to interpret. We study RB and related random-circuit benchmarks under small gate-local Markovian noise by factorizing each noisy gate into its ideal action followed by the exponential of a small error generator and the...

Nonlinear quantum noise polarization in macroscopic nonlinear QEDTier 3

We construct a quantum theory of light in nonlinearly responding materials with dispersion and absorption and, in particular, show the emergence of non-Gaussian noise associated with nonlinear absorption processes. Our theory is based on a path-integral formulation of the microscopic Huttner-Barnett model including cubic matter self-interaction required for χ^((2)) nonline...

Predictive electronic feedback control for narrow-linewidth lasersTier 3

Narrow-linewidth lasers are essential for various key atom-laser interaction processes and optical setups in quantum coherent control, quantum precision measurement, and quantum information science. The Pound-Drever-Hall (PDH) technique is the standard method for the frequency-stabilization of narrow-linewidth lasers, but the inherent time delay in its feedback loop inevitab...

Krylov Complexity and Entropy of Composite Quantum SystemsTier 3

We investigate the behaviour of Krylov complexity as the number of degrees of freedom of a quantum system increases. Specifically, we show that for tensor products of commuting subsystems, the leading excess complexity is controlled by a weighted variance of the subsystem Lanczos coefficients. This provides a quantitative measure of dynamical heterogeneity and a precise char...

Orbital-coherence memory in electrical transport and its self-consistent Maxwell responseTier 3

An internal electronic coherence changes electrical transport only when it feeds back on the physical current. We develop a reduced description of this feedback and distinguish its exact consequences from the assumptions required for a microscopic realization. An opposite-parity two-orbital Hamiltonian identifies a current-coupled orbital force. Under an explicitly stated mo...

Finite Systems in the Space of Projective MeasurementsTier 3

We investigate the dynamics of two-level systems using the quasidistribution Q function projected onto the space of collective measurements. Particular attention is given to evolution under Hamiltonians that are invariant under particle permutations, for pure states that are either invariant or noninvariant under such permutations. This requires constructing an approximate...

Rank-One Loss Maximizes the Spectral Response Strength of Passive Full-Order Exceptional PointsTier 3

We consider finite-dimensional non-Hermitian systems in which all modes coalesce at a single exceptional point. For a rank-one anti-Hermitian contribution, the spectral response strength is computed exactly. For passive systems, we then derive a sharp upper bound at fixed exceptional-point decay rate and show that it is reached only when the decay operator has rank one, corr...

Fluctuation-free Quantum Battery Charging Enabled by Bell-like Entangled and Separable Charger StatesTier 3

The implication of entanglement in quantum battery charging remains poorly understood. In addition, intrinsic quantum randomness poses a fundamental challenge to charging uniformity across distinct trials. To address these issues, we study a three-qubit system within a cascaded collision frame, with two qubits acting as the charger and the third serving as the battery. After...

Local Dephasing Sustains Continuous Time Crystals in a Spin-1/2 EnsembleTier 3

Local pure dephasing suppresses single-spin coherence, yet we show that it sustains continuous time-crystalline order in a fully connected ferromagnetic spin-1/2 ensemble with local decay. An exact operator identity reveals the mechanism: dephasing raises the interaction energy, while energy relaxation on a finite timescale converts this charging into delayed feedback. Wit...

Entanglement certification of attosecond light fields with photoelectron interferometryTier 3

The emergence of entangled quantum optical states in high-harmonic generation raises a fundamental problem about its characterization, namely, \textit{how can entanglement of extreme-ultraviolet radiation be certified for attosecond light fields?} Here, we provide experimentally accessible separability tests, particularly showing that attosecond photoelectron interferometry...

Quantum Constrained Hamiltonian DescentTier 3

We propose Quantum Constrained Hamiltonian Descent (QCHD), a continuous-time quantum framework for optimization under smooth equality constraints. The unconstrained counterpart, Quantum Hamiltonian Descent (QHD), minimizes a cost function by simulating the Schrödinger dynamics of a particle in the potential given by the cost function. Applying Dirac's formalism to the classi...

The often overlooked role of sound in liquid thermal transportTier 3

Formulated a hundred years ago, the Bridgman formula for thermal conductivity of liquids postulates a proportionality between sound velocity and thermal conductivity. This designates phonons as heat carriers in a liquid. Its empirical success has been under-appreciated and its conceptual implications overlooked. It is not mentioned in well-known condensed-matter textbook. He...

Norm-Aware Product Formulas for Hamiltonian SimulationsTier 3

With the target of efficiently solving the quantum-mechanical Schrödinger equation on future quantum computers, first- and second-order product formulas for the time-evolution operator are proposed, designed to exploit hierarchies in the operator norms of the individual Hamiltonian components. Inspired by the THRIFT product formula, these decomposition schemes achieve a supp...

Scale-free localization in pseudo-Hermitian quantum walkTier 3

Scale-free localization is a distinctive phenomenon in non-Hermitian systems, where specific eigenstates, known as scale-free localized states (LSs), possess localization lengths that scale linearly with the system size. Here, we show that a single non-Hermitian defect in one-dimensional quantum walks (QWs) induces scale-free localization. Driven by non-Hermiticity, the QW s...

A Personal History in Quantum Foundations: an Oral History InterviewTier 3

This oral history interview provides Yakir Aharonov's personal and conceptual recollections from the 1950s to the 2000s, focusing on his academic trajectory, some of his major contributions to quantum foundations, and his perspective on the development of the field. The interview traces Aharonov's academic career through the Technion, University of Bristol, Brandeis Universi...

A sharp gradient-corrected Lieb--Thirring inequality in one dimension with applications to density functional theoryTier 3

We first prove a sharp Lieb-Thirring inequality with semi-classical constant and gradient correction in one dimension. In the periodic setting, the corresponding inequality also includes a parity dependent shell-correction term, which appears to be new. Moreover, we also characterize the optimizers of these inequalities. In particular, the optimizing density profiles form a...

Exceptional point structure and chiral state transfer in a rate-operator-engineered PT-symmetric Bose-Hubbard dimerTier 3

The rate operator quantum jumps (ROQJ) is a general method to unravel a master equation describing the dynamics of an open quantum system into stochastic pure state trajectories. By post-selecting on no jumps occurring, one obtains a trajectory generated by a non-Hermitian Hamiltonian. The ROQJ allows for versatile modification of this non-Hermitian evolution, with each non-...

A simple proof of unitary parallelization via port-based teleportationTier 3

Port-based teleportation (PBT) is a variant of quantum teleportation that does not require corrections on the teleported state: starting with N shared EPR states, Alice can teleport a qudit to Bob by performing a measurement on her system and informing Bob which of his N `ports' to retrieve the state, up to infidelity decaying with N. Existing quantum circuits of PBT r...

Time-reversal-based quantum metrology in a central-spin architecture: from SATIN to butterfly echoTier 3

We investigate quantum-enhanced time-reversal-based metrology using the central spin model, in which a single ancilla spin of magnitude S_(rmcen) mediates interactions between N bath spins through a star-graph topology. We demonstrate that the SATIN (Signal Amplification Through Time-reversal Interaction) echo protocol can be implemented in this setup to achieve a Fish...

Coherence and imaginarity of qubit states under vanishing Bargmann invariantsTier 3

Set coherence and set imaginarity are two important quantum resources defined by sets of states. We investigate tuples of qubit states under vanishing higher-order Bargmann invariants and show that their set coherence and set imaginarity are each related to whether they contain a pair of orthogonal states. Specifically, when the relevant higher-order Bargmann invariants vani...

On the Structure of Quantum Finite-Level Systems: Decoherence-Free Subsystems, Quantum Nondemolition Variables, and Back-Action-Evading MeasurementsTier 3

The purpose of this paper is to conduct a comprehensive structural analysis of quantum finite-level systems in the Heisenberg picture, where the evolution of system observables is modeled by bilinear quantum stochastic differential equations (QSDEs). Firstly, real coordinate transformations that preserve commutation and anticommutation relations are characterized, and relati...

Mode-Selective Micromotion Compensation via Coherent Excitation of a Ground-State-Cooled Motional ModeTier 3

Excess micromotion induced by stray DC electric fields limits the control fidelity of trapped-ion experiments. Various techniques have been developed to detect and compensate ion displacements from the RF null by monitoring modulated fluorescence, ion positions, or micromotion sidebands. Although these approaches are effective, they do not probe the displacement through a gr...

Hierarchical Reduction of Invariant Subspaces: From Fragmentation to Many-Body ScarsTier 3

We investigate a hierarchy of invariant Hilbert-space structures connecting Hilbert-space fragmentation, partial solvability, and quantum many-body scars. For spin chains with fragmented spin-1/2 subspaces and their local deformations, we show, using the spin-$1$ XXC chain as a representative example, how successive local deformations reduce extensive irreducible-string...

Probing quasiperiodic spectral accessibility with a finite-rate quantum Otto cycleTier 3

Quasiperiodic systems combine sharply different spectral and localisation regimes with a dense hierarchy of dynamical time scales. We show that a finite-rate quantum Otto cycle can use this structure as a thermodynamic probe, revealing which parts of the spectrum become dynamically accessible and thermodynamically relevant during a driven transformation. For a generalised Au...

Finite-width altermagnetic quantum rings: angular-channel hybridization and Aharonov--Bohm physicsTier 3

We study a finite-width two-dimensional quantum ring with a quadratic d-wave altermagnetic term, Tan--Inkson confinement, a perpendicular magnetic field, and independently tunable Aharonov--Bohm (AB) flux. The altermagnetic interaction mixes m and m±2 angular channels while preserving their parity. Circular symmetry renders the crystal orientation spectrally irreleva...

Florida Atlantic University Awarded $400,000 NSF Grant to Expand Post-Quantum Cryptographic ProtocolsTier 2

Florida Atlantic University received a nearly $400,000 NSF grant to advance post-quantum cryptographic protocols. Led by Dr. Edoardo Persichetti and Dr. Veronika Kuchta, the project will develop advanced functionalities beyond basic primitives to secure decentralized systems against future quantum attacks. The initiative also supports student mentoring and cybersecurity o...

Symmatrics Appoints Andrew Hallman to Strategic Advisory BoardTier 2

Insider Brief PRESS RELEASE — Symmatrics, the cybersecurity company pioneering one-time pad encryption at internet scale and building the new trust layer for the AI and post-quantum era, today announced the appointment of Andrew Hallman to its Strategic Advisory Board. Hallman joins the company as organizations across government, defense, and critical infrastructure se...

Qblox Integrates NVIDIA DGX Spark With Quantum System ControllerTier 2

Insider Brief PRESS RELEASE — Qblox, a leader in scalable quantum control architecture, today announced the integration of NVIDIA DGX Spark with a quantum system controller using NVIDIA NVQLink, achieving measured roundtrip latency below 4.0 µs on NVIDIA RTX PRO 6000 Blackwell and below 7.2 µs on NVIDIA DGX Spark. This enables Qblox to support real-time hybrid […]

Ericsson Canada and ÉTS Partner on Quantum Computing ResearchTier 2

Insider Brief PRESS RELEASE — Ericsson Canada and École de technologie supérieure (ÉTS) have teamed up to further quantum computing research in Quebec, one of the country’s primary quantum computing centres. With support from the Mitacs Accelerate program, the project aims to develop better quantum computing methods that will help run and manage telecom networks […]

Realization of a Superleak in a Quantum GasTier 3

Ultracold quantum gases offer a controllable and microscopically accessible platform for understanding and engineering superfluidity. Yet, realizing a superleak that selectively transports the superfluid while suppressing normal flow has remained elusive. Here, we harness an optical superlattice to realize such a superleak through dynamical selectivity. The superfluid underg...

Size-independent Logarithmic Sobolev Inequalities for Quantum Gibbs SamplersTier 3

We propose a new method for proving L^2 and modified logarithmic Sobolev inequalities with constants independent of system size for quantum Gibbs samplers whose Lindblad generators satisfy Kubo-Martin-Schwinger (KMS) detailed balance. We first establish the L^2 logarithmic Sobolev inequality by transporting it along a temperature-dependent path from the infinite-temperat...

Black Kite Adds Quantum Readiness Checks for Third-Party VendorsTier 2

Insider Brief PRESS RELEASE — Black Kite, the leader in third-party cyber risk management, today announced the release of Quantum Readiness, a new set of controls within the SSL/TLS Strength category of the Black Kite Cyber Rating that evaluates quantum agility across an organization’s third-party vendor ecosystem. Quantum Readiness surfaces which vendors are qua...

Automating quantum circuit optimization with AI agentsTier 3

Compiling quantum algorithms for real devices involves hard optimization problems that can decide whether an algorithm runs at scale. We present a general method for solving such problems with AI agents, with every result certified. It builds on autoresearch loops, in which agents iteratively improve programs against a fixed evaluator and which have recently improved quantum...