Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
28,250
This Month
22
Today
0
Research Volume
13,400 papers in 12 months (-22% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Dequantization and Hardness of Spectral Sum Estimation
Roman Edenhofer, Atsuya Hasegawa, François Le Gall·Sep 24, 2025
We give new dequantization and hardness results for estimating spectral sums of matrices, such as the log-determinant. Recent quantum algorithms have demonstrated that the logarithm of the determinant of sparse, well-conditioned, positive matrices ca...
AI-enhanced Quantum Simulation of Schwinger Model
Ao-Ning Wang, Min-Quan He, Z. D. Wang·Sep 24, 2025
The Schwinger Model from Quantum Electrodynamics (QED) has long served as a valuable simplified model for exploring key physical phenomena in Quantum Chromodynamics (QCD)-a field rich with fundamental insights but is substantially more complex. While...
Digital Signal Processing from Classical Coherent Systems to Continuous-Variable QKD: A Review of Cross-Domain Techniques, Applications, and Challenges
Davi Juvêncio Gomes de Sousa, Caroline da Silva Morais Alves, Valéria Loureiro da Silva +1 more·Sep 24, 2025
This systematic review investigates the application of digital signal processing (DSP) techniques -- originally developed for coherent optical communication systems to continuous-variable quantum key distribution (CV-QKD). The convergence of these do...
Ergodic Properties of Quantum Markov Semigroups
Nicolas Mousset, Nina H. Amini·Sep 24, 2025
In this paper, we study the ergodic theorem for infinite-dimensional quantum Markov semigroups, originally introduced by Frigerio and Verri in 1982, and its latest version developed by Carbone and Girotti in 2021. We provide a sufficient condition th...
A Comparison of Quadratic and Higher-Order Representations for QAOA
Kristina Bell, Adam Lowe, Emily Coles +2 more·Sep 24, 2025
In this work we consider a routing problem and compare quadratic and higher-order representations using the Quantum Approximate Optimisation Algorithm (QAOA). The majority of works investigating QAOA use quadratic Hamiltonians to represent the consid...
You Only Measure Once: On Designing Single-Shot Quantum Machine Learning Models
Chen-Yu Liu, Leonardo Placidi, Kuan-Cheng Chen +2 more·Sep 24, 2025
Quantum machine learning (QML) models conventionally rely on repeated measurements (shots) of observables to obtain reliable predictions. This dependence on large shot budgets leads to high inference cost and time overhead, which is particularly prob...
Hierarchy of timescales in a disordered spin-$1/2$ XX ladder
Kadir Çeven, Lukas Peinemann, Fabian Heidrich-Meisner·Sep 24, 2025
Understanding the timescales associated with relaxation to equilibrium in closed quantum many-body systems is one of the central focuses in the study of their non-equilibrium dynamics. At late times, these relaxation processes exhibit universal behav...
Multichannel highly sensitive diamond quantum magnetometer
Atsumi Yoshimura, Ayumi Kanamoto, Naota Sekiguchi +9 more·Sep 24, 2025
We demonstrate a highly sensitive real-time magnetometry method at two measurement points. This magnetometry method is based on the frequency-division multiplexing of continuous-wave optically detected magnetic resonance. We use two ensembles of nitr...
Nontrivial multi-product commutation relation toward reducing T-count in sequential Pauli-based computation
Yusei Mori, Hideaki Hakoshima, Keisuke Fujii·Sep 24, 2025
Quantum compilers that reduce the number of T gates are essential for minimizing the overhead of fault-tolerant quantum computation. Achieving further T-count reduction calls for identifying equivalent circuit transformation rules beyond those utiliz...
Refine coherent control of atomic qubits via wave-function approach conditioned on no-decay
Yuan Sun·Sep 24, 2025
As a fundamental phenomenon in quantum systems, spontaneous emission constitutes an inevitable source of error, which ultimately degrades the fidelity of quantum logic gates. A successful quantum logic gate needs to operate on the condition that no d...
Induced electric dipole moment coupling in Dirac equation
K. Bakke·Sep 24, 2025
We introduce a nonminimal coupling into the Dirac equation as a model of describing the interaction of a Dirac neutral particle with an induced electric dipole moment with magnetic and electric fields. Then, we obtain a relativistic geometric quantum...
Exact Solvability and Integrability Signatures in a Periodically Driven Infinite-Range Spin Chain: The Case of Floquet interval $π/2$
Harshit Sharma, Sashmita Rout, Avadhut V. Purohit +1 more·Sep 24, 2025
We study the signatures of quantum integrability (QI) in a spin chain model, having infinite-range Ising interaction and subjected to a periodic pulse of an external magnetic field. We analyze the unitary operator, its eigensystem, the single-qubit r...
No Quantum Advantage in Decoded Quantum Interferometry for MaxCut
Ojas Parekh·Sep 24, 2025
Decoded Quantum Interferometry (DQI) is a framework for approximating special kinds of discrete optimization problems that relies on problem structure in a way that sets it apart from other classical or quantum approaches. We show that the instances ...
Computational complexity of injective projected entangled pair states
Dylan Harley, Freek Witteveen, Daniel Malz·Sep 24, 2025
Projected entangled pair states (PEPS) constitute a variational family of quantum states with area-law entanglement. PEPS are particularly relevant and successful for studying ground states of spatially local Hamiltonians. However, computing local ex...
Local reminiscence in the PXP model
Francesco Perciavalle, Gian Marco Rizzo, Francesco Plastina +1 more·Sep 24, 2025
We study the emergence of local reminiscence in the PXP model, a constrained spin system realized in Rydberg atom arrays. The spectrum of this model is characterized by a majority of eigenstates that satisfy the eigenstate thermalization hypothesis, ...
Weak anharmonicity sensing by single- and two-photon drives
Shi-Yu Zeng, Chao-Qun Ai, Xi Cheng +2 more·Sep 24, 2025
The optical cavity undergoes a quantum phase transition when the strength of a two-photon drive exceeds a critical point (CP), and the great sensitivity of CP in sensing has been recognized. However, these methodologies are customized to sense linear...
Dynamically Optimal Unraveling Schemes for Simulating Lindblad Equations
Yu Cao, Mingfeng He, Xiantao Li·Sep 24, 2025
Stochastic unraveling schemes are powerful computational tools for simulating Lindblad equations, offering significant reductions in memory requirements. However, this advantage is accompanied by increased stochastic uncertainty, and the question of ...
Parameter Estimation for Jump-Diffusion Stochastic Master Equations
Weichao Liang, Shuixin Xiao, Daoyi Dong +1 more·Sep 24, 2025
This paper investigates parameter estimation for open quantum systems under continuous observation, whose conditional dynamics are governed by jump-diffusion stochastic master equations (SMEs) associated with quantum nondemolition (QND) measurements....
Information-theoretic analysis of complex eigenmodes across avoided crossings in open microcavities
Kyu-Won Park, Soojoon Lee, Kabgyun Jeong·Sep 24, 2025
Avoided crossings (ACs) are hallmark signatures of mode interaction in quantum and wave systems. Open microcavities whose resonances are naturally described as quasi-normal modes (QNMs) with complex eigenfrequencies offer a convenient platform to obs...
Piezomechanical scattering loss in electro-optics quantum transducers
Mai Zhang, Xin-Biao Xu, Ming Li +3 more·Sep 24, 2025
Quantum transduction between microwave and optical photons is essential for building scalable quantum networks, with electro-optics conversion emerging as a promising approach. Recent experiments, however, observe significant quality factor degradati...