Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Virtual Qudits for Simon's Problem: Dimension-Lifted Algorithms on Qubit Hardware
Abed Semre, Steven Frankel·Dec 7, 2025
Simon's problem admits an exponential quantum speedup, but current quantum devices support only qubits. This work introduces a general construction for simulating qudit versions of Simon's algorithm on qubit hardware by defining virtual qudits implem...
Non-Orthogonal Multiple Access-Based Continuous-Variable Quantum Key Distribution: Secret Key Rate Analysis and Power Allocation
Zhichao Dong, Xiaolin Zhou, Huang Peng +3 more·Dec 7, 2025
We address the multi-user quantum key distribution (QKD) problem under malicious quantum attacks, which is critical for realizing a large-scale quantum Internet. This paper maximizes the sum secret key rate (SKR) of a novel uplink non-orthogonal mult...
Non-Orthogonal Multiple-Access for Coherent-State Optical Quantum Communications Under Lossy Photon Channels
Zhichao Dong, Xiaolin Zhou, Yongkang Chen +3 more·Dec 7, 2025
Coherent states have been increasingly considered in optical quantum communications (OQCs). With the inherent non-orthogonality of coherent states, non-orthogonal multiple-access (NOMA) naturally lends itself to the implementation of multi-user OQC. ...
Exploring electron spin dynamics in spin chains using defects as a quantum probe
L. Soriano, A. Manoj-Kumar, G. Gerbaud +7 more·Dec 7, 2025
We investigate the quantum dynamics of the electron spin resonance of topological defects (edge state) in dimerized chains. These objects are discontinuities of the spin chain protected by the properties of the global system leading to a quantum many...
Witnessing Spin-Orbital Entanglement using Resonant Inelastic X-Ray Scattering
Zecheng Shen, Shuhan Ding, Zijun Zhao +2 more·Dec 7, 2025
Entanglement plays a central role in quantum technologies, yet its characterization and control in materials remain challenging. Recent developments in spectrum-based entanglement witnesses have enabled new strategies for quantifying many-body entang...
Interplay between Standard Quantum Detailed Balance and Thermodynamically Consistent Entropy Production
Xin-Hai Tong, Kohei Yoshimura, Tan Van Vu +1 more·Dec 7, 2025
We demonstrate that, for a quantum Markovian semigroup on a finite-dimensional Hilbert space, if it satisfies the standard quantum detailed balance condition, its generator admits a special representation that yields a vanishing entropy production ra...
Mitigating Barren plateaus in quantum denoising diffusion probabilistic models
Haipeng Cao, Kaining Zhang, Dacheng Tao +1 more·Dec 7, 2025
Quantum generative models leverage quantum superposition and entanglement to enhance learning efficiency for both classical and quantum data. The quantum denoising diffusion probabilistic model (QuDDPM), inspired by its classical counterpart, has bee...
Spurious Strange Correlators in Symmetry-Protected Topological Phases
Wei-Liang Gao, Jie-Yu Zhang, Zheng-Xin Liu +1 more·Dec 7, 2025
Strange correlator is a powerful tool widely used in detecting symmetry-protected topological (SPT) phases. However, the result of strange correlator crucially relies on the adoption of the reference state. In this work, we report that an ill-chosen ...
Experimental demonstration of scalable quantum cryptographic conferencing
Haotao Zhu, Zhenhua Li, Shuai Zhao +6 more·Dec 7, 2025
Quantum network enables a variety of quantum information processing tasks, where multi-user quantum communication is one of the important objectives. Quantum cryptographic conferencing serves as an essential solution to establish secure keys to reali...
Efficient graph-diagonal characterization of noisy states distributed over quantum networks via Bell sampling
Zherui Jerry Wang, Joshua Carlo A. Casapao, Naphan Benchasattabuse +6 more·Dec 7, 2025
Graph states are an important class of entangled states that serve as a key resource for distributed information processing and communication in quantum networks. In this work, we propose a protocol that utilizes a Bell sampling subroutine to charact...
Quantum Temporal Convolutional Neural Networks for Cross-Sectional Equity Return Prediction: A Comparative Benchmark Study
Chi-Sheng Chen, Xinyu Zhang, En-Jui Kuo +3 more·Dec 7, 2025
Quantum machine learning offers a promising pathway for enhancing stock market prediction, particularly under complex, noisy, and highly dynamic financial environments. However, many classical forecasting models struggle with noisy input, regime shif...
Fault-Tolerant Information Processing with Quantum Weak Measurement
Qi Song, Hongjing Li, Chengxi Yu +4 more·Dec 7, 2025
Noise is an important factor that influences the reliability of information acquisition, transmission, processing, and storage. In order to suppress the inevitable noise effects, a fault-tolerant information processing approach via quantum weak measu...
Geometry-Induced Vacuum Polarization and Mode Shifts in Maxwell-Klein-Gordon Theory
Li Wang, Jun Wang, Yong-Long Wang·Dec 7, 2025
Geometric confinement is known to modify single-particle dynamics through effective potentials, yet its imprint on the interacting quantum vacuum remains largely unexplored. In this work, we investigate the Maxwell--Klein--Gordon system constrained t...
High-harmonic generation driven by temporal-mode quantum states of light
Juan M. González-Monge, Johannes Feist·Dec 7, 2025
We develop a theoretical framework for high-harmonic generation (HHG) driven by quantum states of light based on a temporal-mode expansion of the electromagnetic field. This approach extends previous single plane-wave mode treatments to realistic pul...
Laser-written reconfigurable photonic integrated circuit directly coupled to a single-photon avalanche diode array
Giulio Gualandi, Simone Atzeni, Marco Gardina +8 more·Dec 6, 2025
To date, most integrated quantum photonics experiments rely on single-photon detectors operating at cryogenic temperatures coupled to photonic integrated circuits (PICs) through single-mode optical fibers. This approach presents significant challenge...
Solving larger Travelling Salesman Problem networks with a penalty-free Variational Quantum Algorithm
Daniel Goldsmith, Xing Liang, Dimitrios Makris +1 more·Dec 6, 2025
The Travelling Salesman Problem (TSP) is a well-known NP-Hard combinatorial optimisation problem, with industrial use cases such as last-mile delivery. Although TSP has been studied extensively on quantum computers, it is rare to find quantum solutio...
Efficient quantum algorithm for solving differential equations with Fourier nonlinearity via Koopman linearization
Judd Katz, Gopikrishnan Muraleedharan, Abhijeet Alase·Dec 6, 2025
Quantum algorithms offer an exponential advantage with respect to the number of dependent variables for solving certain nonlinear ordinary differential equations (ODEs). These algorithms typically begin by transforming the original nonlinear ODE into...
Scheduling Lattice Surgery with Magic State Cultivation
Steven Hofmeyr, Mathias Weiden, Justin Kalloor +2 more·Dec 6, 2025
Fault-tolerant quantum computation using surface codes relies on efficient scheduling of non-Clifford operations, realized via the injection of magic states produced through a probabilistic process that dominates spacetime costs. Existing scheduling ...
Nonreciprocal photon blockade in a spinning microwave magnomechanical system through kerr-magnon and optical parametric amplifier
S. K. Singh, Mohamed Amazioug, Jia-Xin Peng +3 more·Dec 6, 2025
Unconventional quantum antibunching, arising from quantum interference effects, represents a notable form of quantum correlation that has attracted significant attention for its ability to generate high-quality single-quantum sources. In this work, w...
Hybrid qubit-oscillator module with motional states of two trapped interacting atoms
Jaeyong Hwang, Tianrui Xu, Sean R. Muleady +5 more·Dec 6, 2025
We propose the use of motional states of two interacting atoms trapped in a potential stroboscopically engineered by an optical tweezer as a means to implement a qubit-oscillator system, in analogy to those implemented in circuit quantum electrodynam...