Quantum Computing research · Research Watch · Page 13

Preprint
Not peer reviewed

Researchers estimate teleportation costs for distributing quantum chemistry circuits

Original title: Quantifying Teleportation Overhead in Distributed Unitary Coupled-Cluster Ansätze

A preprint estimates how many Bell pairs different quantum chemistry ansätze need when split across linked quantum processors.

Grier M. Jones et al. · Added 30 Oct 2026

Preprint
Not peer reviewed

Researchers detail query costs for ancilla-free quantum simulation of nonlinear dynamics

Original title: Quantum Complexity of Ancilla-Free Unitary Embeddings for Nonlinear Dynamics via Generalized State-Dependent Double-Bracket Flows

A preprint reports that the cost of simulating nonlinear dynamics on an ancilla-free quantum circuit depends on how stable the dynamics are.

Yuki Ito et al. · Added 30 Oct 2026

Preprint
Not peer reviewed
From Toyota Motor Europe

Preprint maps a quantum algorithm hierarchy for multiscale chemistry modelling

Original title: Quantum Multiscale Modeling: A Hierarchy of Algorithms for Complex Chemical Systems

A preprint proposes matching quantum algorithms to each scale of chemical simulation and questions whether this yields real end-to-end speedups.

Added 30 Oct 2026

Preprint
Not peer reviewed

A preprint describes a quantum method for simulating stochastic differential equations

Original title: Universal Dilation of Linear Itô SDEs: Quantum Trajectories and Lindblad Simulation of Second Moments

A preprint maps linear stochastic differential equations onto quantum systems for two new simulation approaches.

Hsuan-Cheng Wu et al. · Added 29 Oct 2026

Preprint
Not peer reviewed

Algorithm finds measurement labels and gflow for unlabelled quantum graphs

Original title: Finding gflow on unlabelled open graphs

A preprint presents an algorithm that assigns measurements and finds a compatible gflow for unlabelled open graphs in cubic time.

Miriam Backens et al. · Added 29 Oct 2026

Preprint
Not peer reviewed

Researchers derive tight bounds for hybrid quantum-classical query algorithms

Original title: Tight bounds for hybrid quantum-classical query algorithms

A preprint reports matching upper and lower bounds for how query complexity scales when quantum subroutines are limited to short coherent blocks.

Andris Ambainis et al. · Added 29 Oct 2026

Preprint
Not peer reviewed

Preprint links quantum circuit connectivity to variational quantum eigensolver accuracy

Original title: Connectivity Controls Variational Accessibility in Symmetry-Preserving Quantum Circuits

A preprint reports that adding one extra generator connection can unlock accurate ground-state simulation in symmetry-preserving quantum circuits.

Sahinur Reja · Added 29 Oct 2026

Preprint
Not peer reviewed

Preprint reports Google’s supremacy data lacks predicted gate-error asymmetry effect

Original title: Analysis of asymmetric errors in NISQ experiments

A preprint re-examines Google's 2019 quantum supremacy data and reports no sign of a gate-error effect that other researchers had predicted.

Gil Kalai et al. · Added 29 Oct 2026

Preprint
Not peer reviewed
From JPMorgan Chase, Infleqtion

Preprint reports layered quantum circuit boosts noisy-sensor state preparation

Original title: Variational quantum state preparation within an entangle-rotate circuit framework for quantum-enhanced metrology in noisy systems

A preprint describes a layered entangle-rotate circuit that the authors report improves quantum state quality for noisy precision sensing.

Added 29 Oct 2026

Preprint
Not peer reviewed

Preprint proposes prior calibration to fix single-circuit QGAN image generation

Original title: Quantum Fidelity Landscape-Guided Prior Calibration for Single-Circuit QGAN Image Generation

A preprint reports that calibrating a quantum circuit's initial-state 'fidelity landscape' before training can stabilise single-circuit QGAN image generation.

Xue Yang et al. · Added 29 Oct 2026

Preprint
Not peer reviewed
From OptQC

Preprint reports optimal query counts for learning symmetric quantum states and channels

Original title: Optimal learning of covariant quantum states and channels

A preprint gives tight query bounds and efficient circuits for tomography of states and channels with known symmetries.

Added 29 Oct 2026

Preprint
Not peer reviewed

Preprint proposes quantum Fisher information method to benchmark random quantum circuits

Original title: Metrological Benchmarking of Random Quantum Circuits

A preprint proposes using quantum Fisher information from controlled perturbations to benchmark random quantum circuits without classical simulation.

Simone Cavazzoni et al. · Added 29 Oct 2026

Preprint
Not peer reviewed

Preprint explores efficient measurement schemes for a quantum chemistry eigensolver

Original title: Efficient measurement schemes for the Monte Carlo projective quantum eigensolver

A preprint reports that grouping quantum measurements cuts error far more than naive approaches for a Monte Carlo quantum eigensolver.

Divye Baid et al. · Added 29 Oct 2026

Preprint
Not peer reviewed

A preprint proposes extracting quantum gate error constants directly from a QPU

Original title: Numerical Error Extraction by Quantum Measurement Algorithm

Researchers report a quantum measurement protocol that estimates error-law constants for gate approximations, tested on two quantum algorithms via simulation.

Clement Ronfaut et al. · Added 29 Oct 2026

Preprint
Not peer reviewed

Researchers propose a variational quantum method for nonlinear PDEs

Original title: Variational Quantum Homotopy Perturbation Method to Solve Nonlinear Partial Differential Equations

A preprint presents a quantum algorithm combining homotopy perturbation with variational circuits to solve nonlinear partial differential equations more scalably.

Jungin E. Kim et al. · Added 29 Oct 2026

Preprint
Not peer reviewed

Researchers map when compiling quantum circuits from Clifford templates is easy or hard

Original title: Computational Complexity of Clifford Template Compilation: Are Quantum Computers Useful for Compiling Quantum Circuits?

A preprint charts sharp complexity shifts in choosing repetition counts for Clifford templates, from classical ease to NP-completeness and quantum tractability.

Keisuke Fujii · Added 29 Oct 2026

Preprint
Not peer reviewed

Preprint reports quantum kernel tuned to variable interactions aids fraud detection

Original title: When Similarity Is Interaction-Driven: Quantum Kernels for Regime-Sensitive Learning

Researchers report a quantum kernel built around interacting variables outperforms standard kernels on synthetic and fraud-detection data.

Hanqiu Peng et al. · Added 29 Oct 2026

Preprint
Not peer reviewed

A preprint reports a non-variational quantum walk algorithm for optimisation problems

Original title: Sampled-Based Guided Quantum Walk: Non-variational quantum algorithm for combinatorial optimization

Researchers propose SamBa-GQW, a quantum walk guided by classical sampling that skips the variational optimizer step used by QAOA.

Ugo Nzongani et al. · Added 29 Oct 2026

Preprint
Not peer reviewed
From Beavernets Technologies

Researchers report a memory-bounded Pauli decomposition method for qubits and qudits

Original title: Pauli Decomposition by Character Theory: A Memory-Bounded Algorithm for Qubits and Qudits

A preprint describes paulikit, a Pauli decomposition tool the authors say keeps memory use decoupled from operator size, even for very large sparse systems.

Added 29 Oct 2026

Preprint
Not peer reviewed

Researcher revisits a decades-old conjecture on entangled-qubit noise and how to test it

Original title: The Fully Depolarizing Noise Conjecture for Entangled Physical States: A Twenty-Year Perspective

A preprint revisits a long-standing conjecture that entangled qubits suffer a correlated depolarising noise component, and proposes ways to test it experimentally.

Gil Kalai · Added 29 Oct 2026

523 entries