Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Gravitationally Induced Entanglement Between Particles in Harmonic Traps: Limits for Gaussian States
Julia Tokarska, Andrzej Dragan·Dec 30, 2025
Gravitationally induced entanglement has been proposed as a probe of the quantum nature of gravity. This work analyzes a system of two particles in harmonic traps interacting only through gravity, considering thermal and two-mode squeezed initial sta...
Quantum Computing, Ising Formulation, and the Traveling Salesman Problem
Omer Gurevich, Maor Matityahu, Tal Mor·Dec 30, 2025
Ising formulation is important for many NP problems (Lucas, 2014). This formulation enables implementing novel quantum computing methods including Quantum Approximate Optimization Algorithm and Variational Quantum Eigensolver (VQE). Here, we investig...
In defense of temporal Tsirelson bound
Antoni Wójcik, Jan Wójcik·Dec 30, 2025
In a recent paper, Chatterjee et al. [Phys. Rev. Lett 135, 220202 (2025)] analyze and experimentally implement a specific unitary evolution of a simple quantum system. The authors refer to this type of dynamics as a "superposition of unitary time evo...
Quantum Thermodynamics and Quantum Perspectives
Camille L Latune·Dec 30, 2025
After a brief historical perspective, we introduce the key notions of work and heat for quantum systems, to then apply them to quantum engines operating on quantum Otto and Carnot cycles. The irreversible and dissipative character of the quantum Otto...
Ergodic dynamics in iterated quantum protocols
Attila Portik, Orsolya Kálmán, Tamás Kiss·Dec 30, 2025
We study measurement-induced nonlinear dynamics generated by an iterated quantum protocol combining an entangling gate, a single-qubit rotation, and post-selection. For pure single-qubit inputs, a particular choice of the single-qubit unitary yields ...
Deterministic distribution of W-class states in quantum networks
Souvik Chatterjee, Prasenjit Deb, Chandan Datta +1 more·Dec 30, 2025
Multipartite entangled states possess a number of non-intuitive properties, making them a useful resource for various quantum information-processing tasks. The three-qubit W-state is one such example where every state is robust to single-qubit loss. ...
Using NV centers in diamond to detect DC to very-low frequency magnetic fields
Valts Krumins, Ivars Krastins, Oskars Rudzitis +3 more·Dec 30, 2025
In this work we present a compact and portable tabletop magnetometer that utilizes negatively charged nitrogen-vacancy (NV) centers in diamond. The magnetometer is operated using a dual microwave resonance detection approach in combination with an op...
Quantifying the advantage of vector over scalar magnetic sensor networks for undersea surveillance
Wenchao Li, Xuezhi Wang, Qiang Sun +2 more·Dec 30, 2025
Magnetic monitoring of maritime environments is an important problem for monitoring and optimising shipping, as well as national security. New developments in compact, fibre-coupled quantum magnetometers have led to the opportunity to critically eval...
Capacity-time Trade-off in Highly Reliable Quantum Memory
Miao-Miao Yi, L. X. Cui, Y -M Du +1 more·Dec 30, 2025
Reliable optical quantum memory is limited by real-world imperfections such as disordered coupling and detuning. Existing studies mostly address these factors separately, while in practice their correlated effects set a fundamental limit on storage p...
The Quantum State Continuity Problem and Temporal Enforcement Against Fork Attacks
Samet Ünsal·Dec 30, 2025
We introduce the Quantum State Continuity Problem (QSCP), a security objective orthogonal to identity authentication that captures whether a systems current execution is a legitimate continuation of a unique past execution. We show that classical and...
Entropic order parameters and topological holography
Hua-Chen Zhang, Germán Sierra, Javier Molina-Vilaplana·Dec 30, 2025
We show that the symmetry topological field theory (SymTFT) construction, also known as the topological holography, provides a natural and intuitive framework for the entropic order parameter characterising phases with (partially) broken symmetries. ...
A short technical comment on Bub's There is No Quantum World (arXiv:2512.18400v2) and a brief remark on related Grangier's reply (arXiv:2512.22965v1)
Krzysztof Sienicki·Dec 30, 2025
This note is a friendly technical check of Jeffrey Bub's There is No Quantum World (arXiv:2512.18400v2). I flag one unambiguous mathematical slip (a cardinality identity that implicitly assumes the Continuum Hypothesis) and then point out a few place...
Variational Quantum Brushes
Jui-Ting Lu, Henrique Ennes, Chih-Kang Huang +1 more·Dec 30, 2025
Quantum brushes are computational arts software introduced by Ferreira et al (2025) that leverage quantum behavior to generate novel artistic effects. In this outreach paper, we introduce the mathematical framework and describe the implementation of ...
Linear exciton Hall and Nernst effects in monolayer two-dimensional semiconductors
Weilong Guo, Lianguo Li, Qingjun Tong +1 more·Dec 30, 2025
This paper focuses on the study of linear exciton Hall and Nernst effects in monolayer two-dimensional (2D) semiconductors, employing the semi-classical transport theory. By deriving the exciton Berry curvature in momentum space for a general inhomog...
Photon Echo in Uniaxially Stressed Germanium with Antimony Donors
R. Kh. Zhukavin, V. D. Kukotenko, P. A. Bushuykin +8 more·Dec 30, 2025
Photon echo is observed in n-type Ge uniaxially stressed along the [111] crystallographic direction, with a coherence relaxation time of 300 ps. The nonlinear polarization responsible for the effect originates from antimony donors. Uniaxial stress in...
Testing Noise Correlations by an AI-Assisted Two-Qubit Quantum Sensor
Dario Fasone, Shreyasi Mukherjee, Mauro Paternostro +3 more·Dec 30, 2025
We introduce and validate a machine learning-assisted protocol to classify time and space correlations of classical noise acting on a quantum system, using two interacting qubits as probe. We consider different classes of noise, according to their Ma...
Entanglement dynamics driven by topology and non-Hermiticity
Li-Wei Wang, Bolun Hu, Haixiao Zhang +3 more·Dec 30, 2025
The interplay between topology and non-Hermiticity gives rise to exotic dynamic phenomena that challenge conventional wave-packet propagation and entanglement dynamics. While recent studies have established the non-Hermitian skin effect (NHSE) as a k...
Path Integral Solution for Dissipative Generative Dynamics
Xidi Wang·Dec 30, 2025
Can purely mechanical systems generate intelligent language? We prove that dissipative quantum dynamics with analytically tractable non-local context aggregation produce coherent text generation, while conservation laws cause fundamental failure. Emp...
5-GHz chip-based quantum key distribution with 1Mbps secure key rate over 150 km
Guo-Wei Zhang, Sheng-Teng Zheng, You Xiao +16 more·Dec 30, 2025
Quantum key distribution (QKD) enables secure communication by harnessing the fundamental principles of quantum physics, which inherently guarantee information-theoretic security and intrinsic resistance to quantum computing attacks. However, the sec...
Parametric amplification of continuous variable entangled state for loss-tolerant multi-phase estimation
Sijin Li, Wei Wang·Dec 30, 2025
Quantum parameter estimation exploits quantum states to achieve estimation sensitivity beyond classical limit. In continuous variable (CV) regime, squeezed state has been exploited to implement deterministic phase estimation. It is however, often res...