Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Towards a point-to-point CV-QKD system: Implementation challenges and perspectives
Davi Juvêncio Gomes de Sousa, Nelson Alves Ferreira Neto, Christiano M. S. Nascimento +7 more·Dec 22, 2025
This article presents an analysis of the practical challenges and implementation perspectives of point-to-point continuous-variable quantum key distribution (CV-QKD) systems over optical fiber. The study addresses the physical layer, including the de...
Quantum Imaging of Birefringent Samples using Hong-Ou-Mandel Interference
Carolina Gonçalves, Tiago D. Ferreira, Catarina S. Monteiro +1 more·Dec 22, 2025
Two-photon interference in a Hong-Ou-Mandel (HOM) interferometer can be used as a quantum sensing mechanism due to the sensitivity of the interference dip to perturbations of the photon indistinguishability. In particular, recent works have generaliz...
Input phase noise in Gaussian Boson sampling
Magdalena Parýzková, Craig S. Hamilton, Igor Jex +2 more·Dec 22, 2025
Gaussian boson sampling is an important protocol for testing the performance of photonic quantum simulators. As such, various noise sources have been investigated that degrade the operation of such devices. In this paper, we examine a situation with ...
Clifford Volume and Free Fermion Volume: Complementary Scalable Benchmarks for Quantum Computers
Attila Portik, Orsolya Kálmán, Thomas Monz +1 more·Dec 22, 2025
As quantum computing advances toward the late-NISQ and early fault-tolerant eras, scalable and platform-independent benchmarks are essential for quantifying computational capacity in a classically verifiable manner. We introduce two volumetric benchm...
Lorentz Invariant Master Equation for Quantum Systems
Pranav Vaidhyanathan, Gerard J. Milburn·Dec 22, 2025
Irreversibility implies a preferred flow of time, yet special relativity denies the existence of a preferred clock. This tension has long obstructed the formulation of a relativistic master equation: standard Markovian approximations either break Lor...
Spectral Gap Estimation via Adiabatic Preparation
Davide Cugini, Francesco Ghisoni, Angela Rosy Morgillo +1 more·Dec 22, 2025
Estimating energy gaps, i.e. the energy difference between two different states, in quantum systems is crucial for understanding their properties. Conventionally, spectral gap estimation relies on independently computing the ground-state and first-ex...
Limitations of Entangled Two-Photon Absorption detection
René Pollmann, Franz Roeder, Christine Silberhorn +1 more·Dec 22, 2025
We introduce a method for determining the sensitivity of any given Entangled Two-Photon Absorption (ETPA) measurement. By modeling all signal and noise contributions to the measurement, we derive a single numerical value that describes the sensitivit...
Noisy Monitored Quantum Circuits
Shuo Liu, Shao-Kai Jian, Shi-Xin Zhang·Dec 21, 2025
Noisy monitored quantum circuits have emerged as a versatile and unifying framework connecting quantum many-body physics, quantum information, and quantum computation. In this review, we provide a comprehensive overview of recent advances in understa...
Temperature-enhanced quantum sensing for the cutoff frequency of Ohmic environments
Yuan Ji-Bing, Song Ya-Ju, Tang Shi-Qing +2 more·Dec 21, 2025
We investigate the quantum sensing performance of a dephasing qubit as a probe in Ohmic environments, characterized by the coupling strength $η$, the Ohmicity parameter $s$, and the cutoff frequency $ω_c$ to be estimated. The performance is quantifie...
Toward Live Noise Fingerprinting in Quantum Software Engineering
Avner Bensoussan, Elena Chachkarova, Karine Even-Mendoza +3 more·Dec 21, 2025
Contemporary quantum computers are inherently noisy, posing significant challenges for the development and testing of quantum software. Simplified or outdated noise assumptions can lead to incorrect assessments of program correctness, obscure debuggi...
Image Denoising via Quantum Reservoir Computing
Soumyadip Das, Luke Antoncich, Jingbo B. Wang·Dec 21, 2025
Quantum Reservoir Computing (QRC) leverages the natural dynamics of quantum systems for information processing, without requiring a fault-tolerant quantum computer. In this work, we apply QRC within a hybrid quantum classical framework for image deno...
Quantum Nonlocality and Device-Independent Randomness Robust to Relaxations of Bell Assumptions
Ravishankar Ramanathan, Yuan Liu·Dec 20, 2025
The question of certifying quantum nonlocality under a relaxation of the assumptions in the Bell theorem has gained traction, with potential for device-independent applications under weak seeds and cross-talk. Recently, it was shown that quantum nonl...
Cyber Threat Detection Enabled by Quantum Computing
Zisheng Chen, Zirui Zhu, Xiangyang Li·Dec 20, 2025
Threat detection models in cybersecurity must keep up with shifting traffic, strict feature budgets, and noisy hardware, yet even strong classical systems still miss rare or borderline attacks when the data distribution drifts. Small, near-term quant...
Multifractality Analysis of Single Qubit Quantum Circuit Outcomes for a Superconducting Quantum Computer
Mohammadreza Saghafi, Lamine Mili, Karlton Wirsing·Dec 20, 2025
We present a multifractal analysis of time series data obtained by repeatedly running a single-qubit quantum circuit on IBM superconducting quantum computers, in which the measurement outcomes are recorded as the number of zeros. By applying advanced...
Size-Consistent Quantum Chemistry on Quantum Computers
Noah Garrett, Michael Rose, David A. Mazziotti·Dec 20, 2025
Hybrid quantum-classical algorithms have begun to leverage quantum devices to efficiently represent many-electron wavefunctions, enabling early demonstrations of molecular simulations on real hardware. A key prerequisite for scalable quantum chemistr...
Superconducting qubit decoherence correlated with detected radiation events
A. R. Castelli, K. M. Beck, L. D. H. Alegria +6 more·Dec 20, 2025
Most quantum error correction (QEC) protocols for superconducting qubits assume spatially and temporally uncorrelated decoherence events; however, recent evidence suggests that cosmic radiation induces spatially correlated errors. We present a platfo...
Simulation of depolarizing channel exploring maximally non separable spin-orbit mode
G. Tiago, V. S. Lamego, M. H. M. Passos +2 more·Dec 19, 2025
The Depolarizing channel is one of the most important noise models and constitutes a reliable benchmark for the quantum information field. In this work, we present a simple way to emulate a Depolarizing channel by exploring a maximally non separable ...
Correcting quantum errors one gradient step at a time
Manav Seksaria, Anil Prabhakar·Dec 19, 2025
In this work, we introduce a general, gradient-based method that optimises codewords for a given noise channel and fixed recovery. We do so by differentiating fidelity and descending on the complex coefficients using finite-difference Wirtinger gradi...
A Concept of Two-Point Propagation Field of a Single Photon: A Way to Picometer X-ray Displacement Sensing and Nanometer Resolution 3D X-ray Micro-Tomography
Li Hua Yu·Dec 19, 2025
We introduce the two-point propagation field (TPPF) -- a real-valued, phase-sensitive quantity defined as the functional derivative of the single-photon detection probability with respect to an infinitesimal opaque perturbation placed between source ...
Domain-Aware Quantum Circuit for QML
Gurinder Singh, Thaddeus Pellegrini, Kenneth M. Merz,·Dec 19, 2025
Designing parameterized quantum circuits (PQCs) that are expressive, trainable, and robust to hardware noise is a central challenge for quantum machine learning (QML) on noisy intermediate-scale quantum (NISQ) devices. We present a Domain-Aware Quant...