Quantum Computing research · Research Watch · Page 9

Journal article
Review status unknown

Researchers explain hysteresis seen on quantum annealers with a hybrid quantum-classical model

Original title: Magnetic Memory and Hysteresis from Quantum Transitions: Theory and Experiments on Quantum Annealers

A new theoretical framework reproduces magnetic hysteresis patterns measured on D-Wave quantum annealers, including effects classical physics forbids.

Frank Barrows et al. · Added 4 Nov 2026 · Released Jul 2025

Preprint
Not peer reviewed
From JoS Quantum, Bundesdruckerei

Preprint applies quantum machine learning to find optimal BB84 eavesdropping attacks

Original title: QKD as a Quantum Machine Learning task

A preprint uses quantum machine learning to rediscover and extend known attacks on the BB84 quantum key distribution protocol.

Added 4 Nov 2026 · Released Feb 2025

Preprint
Not peer reviewed

Researchers report a method to bound qubit leakage and fidelity despite SPAM errors

Original title: Leakage benchmarking with decohering subgroups in the presence of preparation and measurement errors

A preprint presents decohering subgroup randomised benchmarking, tested on a dual-rail transmon qubit, to bound leakage and fidelity when preparation and measurement are imperfect.

Shawn Geller et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

A preprint proposes forgetting quantum sensor data without re-measuring states

Original title: Federated Unlearning of Quantum Data via Classical Shadows

Researchers describe a method that lets federated quantum learning forget data using stored classical shadows instead of replaying quantum states.

Zihao Ding et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

Preprint proposes protocol to characterise coherent noise with far fewer experiments

Original title: Tomography for coherent noise

A preprint describes a method to identify coherent noise models in quantum error correction using only single-qubit tomography.

Long Huang · Added 3 Nov 2026

Preprint
Not peer reviewed

A preprint simplifies Petz recovery for quantum error correction into one QSVT step

Original title: Petz Recovery through a Single Polar Transformation for Approximate Quantum Error Correction

Researchers describe a single-transformation quantum circuit approach to Petz recovery, aiming to ease implementation for approximate quantum error correction.

Hanzhang Zhao et al. · Added 3 Nov 2026

Preprint
Not peer reviewed
From IonQ

Researchers report same-isotope ion cooling using Zeeman shifts to shield data qubits

Original title: Sympathetic Cooling in Trapped Ions with Spectral Selectivity via the Zeeman Shift

A preprint describes a trapped-ion sympathetic cooling scheme that uses Zeeman shifts to isolate coolant ions from data qubits without changing species or isotope.

Added 3 Nov 2026

Preprint
Not peer reviewed

Preprint reports neural ODE method extending short-time quantum data into long-time dynamics

Original title: Learning Quantum Operator Dynamics from Short-Time Data

A preprint describes a machine-learning approach that extrapolates long-time quantum operator behaviour from brief hardware measurements.

Jinyang Li et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

Researchers report cavity-coupled Rydberg atom array for quantum networking

Original title: Realization of a cavity-coupled Rydberg array

A preprint describes trapped atoms coupled to both an optical cavity and Rydberg states at the same location.

Jacopo De Santis et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

A preprint reports a decoder that splits qubit readout errors into distinct channels

Original title: Syndrome-Resolved Decoding of Qubit Readout Errors

Researchers propose RED, a method that decodes repeated binary qubit readouts to separate assignment, bit-flip and leakage errors.

Han Zheng et al. · Added 3 Nov 2026

Preprint
Not peer reviewed
From QMill

Preprint examines how quantum circuit results diverge across cloud providers

Original title: Realization Divergence in Multi-Provider Quantum Computing: A Pre-Registered Study of What Survives Measurement

A preprint reports that qubit placement, not circuit size, best explains differing compiled-circuit overheads across quantum hardware providers.

Added 3 Nov 2026

Preprint
Not peer reviewed

Researchers report sparse generators cut gate counts in quantum imaginary-time evolution

Original title: Sparse-QITE: Discovering Compact Generators for Quantum Imaginary-Time Evolution via Regularization Methods

A preprint introduces Sparse-QITE, which uses regularisation to shrink circuit size for quantum ground-state preparation while keeping accuracy.

Rafael Gómez-Lurbe et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

Preprint argues quantum computers still face signal-to-noise limits despite avoiding sign problems

Original title: Signal-to-noise problems in fault-tolerant quantum computation

A preprint contends that fault-tolerant quantum computers avoid the classical sign problem but still suffer exponentially growing sampling noise.

Hyunwoo Oh · Added 3 Nov 2026

Preprint
Not peer reviewed
From Beijing Yuanjie Exploration Quantum Technology

Researchers report framework linking algorithm design to surface-code hardware layout

Original title: Low-cost algorithm-to-execution framework for surface-code quantum computing

A preprint describes a framework that tailors surface-code quantum layouts to specific algorithms, reporting large cuts in modelled resource costs.

Added 3 Nov 2026

Preprint
Not peer reviewed

Preprint links exact Floquet recurrences to number theory and quantum ‘magic’

Original title: Cyclotomic Structure and Exact Recurrences in Floquet Many-Body Quantum Dynamics

A preprint reports an arithmetic test for when periodically driven quantum systems return to their starting state exactly.

Amit Anand et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

Preprint reports local error correction extends time-crystal memory on quantum chip

Original title: Local error correction prolongs time-crystalline memory

A preprint reports that stochastic bit-flip correction roughly doubled how long a superconducting processor sustained a time-crystal-like response.

Benedikt Fauseweh · Added 3 Nov 2026

Preprint
Not peer reviewed

Preprint maps which quantum states can directly power magic gate teleportation

Original title: Magic Gate Teleportation: Structure, Useful Resource States, and Simpler Feedforward

A preprint analyses which non-stabiliser quantum states can directly implement non-Clifford gates via teleportation, and when feedforward can be simplified.

Yunzhe Zheng et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

Preprint explores how detecting qubit loss could sharpen quantum sensing limits

Original title: Optimal quantum metrology protocols with erasure qubits

A preprint analyses how detectable erasure noise reshapes precision limits and optimal strategies for single-qubit quantum sensing.

Michal Arieli et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

Preprint proposes weak-coupling shortcut to cut classical cost of circuit knitting

Original title: Quantum circuit knitting using a weak-coupling approximation

A preprint describes a way to split quantum circuits across small devices that avoids exponential classical overhead when connections are weak.

John P. T. Stenger et al. · Added 3 Nov 2026

Preprint
Not peer reviewed

Researchers report GPU-based classical solvers beat quantum methods on multi-objective MaxCut

Original title: Multi-Objective Optimization with Quantum-Annealing-Inspired Algorithms

A preprint reports that GPU-accelerated quantum-annealing-inspired algorithms outperform quantum hardware on multi-objective MaxCut benchmarks.

Xian-Zhe Tao et al. · Added 3 Nov 2026

523 entries