Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Efficient Quantum Simulation of Non-Adiabatic Molecular Dynamics with Precise Electronic Structure
Tianyi Li, Yumeng Zeng, Qiming Ding +6 more·Dec 2, 2025
In the study of non-adiabatic chemical processes such as photocatalysis and photosynthesis, non-adiabatic molecular dynamics (NAMD) is an indispensable theoretical tool, which requires precise potential energy surfaces (PESs) of ground and excited st...
Universal Sensitivity Bound for Thermal Quantum Dynamic Sensing
Rui Zhang, Yang Yang, Wenkui Ding +1 more·Dec 2, 2025
This work unifies the equilibrium and non-equilibrium frameworks of quantum metrology within the context of many-body systems. We investigate dynamic sensing schemes to derive an upper bound on the quantum Fisher information for probe states in therm...
Unlocking the Power of Boltzmann Machines by Parallelizable Sampler and Efficient Temperature Estimation
Kentaro Kubo, Hayato Goto·Dec 2, 2025
Boltzmann machines (BMs) are powerful energy-based generative models, but their heavy training cost has largely confined practical use to Restricted BMs (RBMs) trained with an efficient learning method called contrastive divergence. More accurate lea...
On the ellipticity of the higher rank numerical range
N. Bebiano, R. Lemos, G. Soares·Dec 2, 2025
The higher rank numerical range is a concept that generalizes the classical numerical range, and it has application in quantum error correction. We investigate these sets for $2$-by-$2$ block matrices with associated Kippenhahn curves consisting of e...
Equilibrium SAT based PQC: New aegis against quantum computing
Keum-Bae Cho·Dec 2, 2025
Public-key cryptography algorithms have evolved towards increasing computational complexity to hide desired messages, which is accelerating with the development of the Internet and quantum computing. This paper introduces a novel public-key cryptogra...
Quantum-Classical Separation in Bounded-Resource Tasks Arising from Measurement Contextuality
Shashwat Kumar, Eliott Rosenberg, Alejandro Grajales Dau +280 more·Dec 1, 2025
The prevailing view is that quantum phenomena can be harnessed to tackle certain problems beyond the reach of classical approaches. Quantifying this capability as a quantum-classical separation and demonstrating it on current quantum processors has r...
Microwave Circulation in an Extended Josephson Junction Ring
Dat Thanh Le, Arkady Fedorov, Thomas M. Stace·Dec 1, 2025
Circulators are nonreciprocal devices that enable directional signal routing. Nonreciprocity, which requires time-reversal symmetry breaking, can be produced in waveguides in which the propagation medium moves relative to the waveguide at a moderate ...
Evolution of the eigenvalues and eigenstates of the single-particle reduced density operator during two-particle scattering
Arsam Najafian, Mark Van Raamsdonk·Dec 1, 2025
A particle initially in a pure state but interacting with some environment evolves into a discrete ensemble of pure states, the eigenstates of its reduced density operator, with ensemble probabilities given by the corresponding eigenvalues. In this w...
Enhanced readout contrast of V2 ensembles in 4H-SiC through resonant optical excitation
Infiter Tathfif, Samuel G. Carter·Dec 1, 2025
The V2 silicon vacancy defect in 4H-SiC has emerged as a promising system for quantum technologies due to its favorable optical and spin properties and the advantages of the SiC host. However, the readout contrast - an important benchmark for quantum...
Magnetoelectric effect in the mixed valence polyoxovanadate cage V$_{12}$
Piotr Kozłowski·Dec 1, 2025
Development of spintronic and quantum computing devices increases demand for efficient, energy saving method of spin manipulation at molecular scale. Polyoxovanadate molecular magnets being susceptible to both electric and magnetic fields may serve h...
Uncertainty Principle and Angular Momentum Generation in Microscopic Fission Models
G. Scamps, A. Guilleux, D. Regnier +1 more·Dec 1, 2025
The generation of angular momentum (intrinsic spin) in fission fragments has recently attracted renewed attention. While several microscopic approaches reproduce the spin distribution qualitatively using projection techniques, the physical origin of ...
Progress in quantum metrology and applications for optical atomic clocks
Raphael Kaubruegger, Adam M. Kaufman·Dec 1, 2025
Quantum entanglement offers powerful opportunities for enhancing measurement sensitivity beyond classical limits, with optical atomic clocks serving as a leading platform for such advances. This chapter introduces the principles of entanglement-enhan...
Absorption-Based Qubit Estimation in Discrete-Time Quantum Walks
Edgard P. M. Amorim, Lorena R. Cerutti, O. P. de Sá Neto +1 more·Dec 1, 2025
We investigate state estimation in discrete-time quantum walks with a single absorbing boundary. Using a spectral approach, we obtain closed expressions for the escape probability as a function of the coin state and the boundary position, and their c...
Methodological Realism and Quantum Mechanics
Michael E. Cuffaro·Dec 1, 2025
I distinguish two senses in which one can take a given physical theory to be `complete'. On the first, a complete physical theory is one that, in principle, completely describes physical reality. On the second, a complete physical theory is one that ...
Testing ER = EPR with Hydrogen
Irfan Javed, Edward Wilson-Ewing·Dec 1, 2025
According to the ER = EPR conjecture, entangled particles are connected by quantum wormholes. Under the assumption that some of the electric field surrounding an entangled charged particle leaks into the wormhole, we show that this effect will modify...
Generalizing fusion rules by shuffle: Symmetry-based classifications of nonlocal systems constructed from similarity transformations
Yoshiki Fukusumi, Taishi Kawamoto·Dec 1, 2025
We study fusion rings, or symmetry topological field theories (SymTFTs), which lie outside the non-negative integer matrix representation (NIM-rep), by combining knowledge from generalized symmetry and that from pseudo-Hermitian systems. By applying ...
Quantum Advantage in Resource Estimation
William A. Simon, Peter J. Love·Dec 1, 2025
Quantum computing promises the ability to compute properties of quantum systems exponentially faster than classical computers. Quantum advantage is achieved when a practical problem is solved more efficiently on a quantum computer than on a classical...
Network theory classification of quantum matter based on wave function snapshots
Riccardo Andreoni, Vittorio Vitale, Cristiano Muzzi +3 more·Dec 1, 2025
Quantum computers and simulators offer unparalleled capabilities of probing quantum many-body states, by obtaining snapshots of the many-body wave function via collective projective measurements. The probability distribution obtained by such snapshot...
Observation of an anomaly in the statistics of Kibble-Zurek defects
Jan Balewski, Alexey Khudorozhkov, Siva Darbha +8 more·Dec 1, 2025
The Kibble-Zurek mechanism quantifies defect formation during adiabatic passage across a continuous phase transition, providing key insights into universality in quantum many-body systems. We explore counting statistics of defects in adiabatic passag...
Momentum entanglement at colliders: the $H \to WW,ZZ$ case
J. A. Aguilar-Saavedra·Dec 1, 2025
We address momentum entanglement in Higgs decays to weak boson pairs, $H \to WW,ZZ$, by discretising momentum space. The momenta of the two weak bosons are entangled, as well as the degrees of freedom in momentum and spin spaces. For $H \to ZZ$ in th...