Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Entanglement dynamics of multi-fluxonium-qubits under Non-Markovian TLS noise
Chenghong Ji, Chaoying Zhao·Dec 31, 2025
The research on open quantum systems is important for both quantum computing and quantum sensing. So far, we can only use the main equation to make an approximate description. The dynamics of a single Fluxonium qubit under Markovian environment satis...
Continuous-variable quantum key distribution network based on entangled states of optical frequency combs
Hai Zhong, Qianqian Hu, Zhiyue Zuo +3 more·Dec 31, 2025
Continuous-variable quantum key distribution (CVQKD) features a high key rate and compatibility with classical optical communication. Developing expandable and efficient CVQKD networks will promote the deployment of large-scale quantum communication ...
Fragile Topological Phases and Topological Order of 2D Crystalline Chern Insulators
Hisham Sati, Urs Schreiber·Dec 31, 2025
We apply methods of equivariant homotopy theory, which may not previously have found due attention in condensed matter physics, to classify first the fragile/unstable topological phases of 2D crystalline Chern insulator materials, and second the poss...
Interfacing Atomic Spins with Photons for Quantum Metrology, Simulation and Computation
Monika Schleier-Smith·Dec 31, 2025
These lecture notes discuss applications of atom-light interactions in cavities to quantum metrology, simulation, and computation. A focus is on nonlocally interacting spin systems realized by coupling many atoms to a delocalized mode of light. We wi...
Quantum Visual Word Sense Disambiguation: Unraveling Ambiguities Through Quantum Inference Model
Wenbo Qiao, Peng Zhang, Qinghua Hu·Dec 31, 2025
Visual word sense disambiguation focuses on polysemous words, where candidate images can be easily confused. Traditional methods use classical probability to calculate the likelihood of an image matching each gloss of the target word, summing these t...
A fast and exact approach for stabilizer Rényi entropy via the XOR-FWHT algorithm
Xuyang Huang, Han-Ze Li, Ching Hua Lee +1 more·Dec 31, 2025
Quantum advantage is widely understood to rely on key quantum resources beyond entanglement, among which nonstabilizerness (quantum ``magic'') plays a central role in enabling universal quantum computation. However, the exact evaluation of the second...
Collective behaviors of an electron gas in the mean-field regime
Dong Hao Ou Yang·Dec 31, 2025
In this paper, we study the momentum distribution of an electron gas in a $3$-dimensional torus. The goal is to compute the occupation number of Fourier modes for some trial state obtained through random phase approximation. We obtain the mean-field ...
Hall's exact variance decomposition in Bohmian Mechanics
Weixiang Ye·Dec 31, 2025
Halls exact variance decomposition [Phys. Rev. A 64, 052103 (2001)] splits the quantum variance of an observable into the ensemble variance of an optimal position based estimate and a residual nonclassical inaccuracy. We evaluate this decomposition i...
Volcano Architecture for Scalable Quantum Processor Units
Dong-Qi Ma, Qing-Xuan Jie, Ya-Dong Hu +12 more·Dec 31, 2025
Quantum information processing platforms based on array of matter qubits, such as neutral atoms, trapped ions, and quantum dots, face significant challenges in scalable addressing and readout as system sizes increase. Here, we propose the "Volcano" a...
Arithmetic spectral transition for the unitary almost Mathieu operator
Fan Yang·Dec 31, 2025
We study the unitary almost Mathieu operator (UAMO), a one-dimensional quasi-periodic unitary operator arising from a two-dimensional discrete-time quantum walk on $\mathbb Z^2$ in a homogeneous magnetic field. In the positive Lyapunov exponent regim...
Dynamic Phase Transitions in Periodically Driving 1D Ising Model
Yuanyuan Cheng, Yuxia Zhang, Tianhui Qiu +2 more·Dec 31, 2025
This work investigates dynamical quantum phase transitions (DQPTs) in a one-dimensional Ising model subjected to a periodically modulated transverse field. In contrast to sudden quenches, we demonstrate that DQPTs can be induced in two distinct ways....
Band Structure and Dynamics of Single Photons in Atomic Lattices
Wenxuan Xie, John C. Schotland·Dec 31, 2025
We present a framework to investigate the collective properties of atomic lattices in one, two, and three dimensions. We analyze the single-photon band structure and associated atomic decay rates, revealing a fundamental dependence on dimensionality....
Hidden rotation symmetry of the Jordan-Wigner transformation and its application to measurement in quantum computation
Grant Davis, James K. Freericks·Dec 31, 2025
Using a global rotation by theta about the z-axis in the spin sector of the Jordan-Wigner transformation rotates Pauli matrices X and Y in the x-y-plane, while it adds a global complex phase to fermionic quantum states that have a fixed number of par...
Matter with apparent and hidden spin physics
Jia-Xin Xiong, Xiuwen Zhang, Lin-Ding Yuan +1 more·Dec 31, 2025
Materials with interesting physical properties are often designed based on our understanding of the target physical effects. The physical properties can be either explicitly observed ("apparent") or concealed by the perceived symmetry ("hidden") but ...
QAOA-MaxCut has barren plateaus for almost all graphs
Rui Mao, Pei Yuan, Jonathan Allcock +1 more·Dec 31, 2025
The QAOA has been the subject of intense study over recent years, yet the corresponding Dynamical Lie Algebra (DLA)--a key indicator of the expressivity and trainability of VQAs--remains poorly understood beyond highly symmetric instances. An exponen...
Probabilistic Computers for Neural Quantum States
Shuvro Chowdhury, Jasper Pieterse, Navid Anjum Aadit +2 more·Dec 31, 2025
Neural quantum states efficiently represent many-body wavefunctions with neural networks, but the cost of Monte Carlo sampling limits their scaling to large system sizes. Here we address this challenge by combining sparse Boltzmann machine architectu...
TLS-induced thermal nonlinearity in a micro-mechanical resonator
Cyril Metzger, Alec L. Emser, Brendon C. Rose +1 more·Dec 31, 2025
We present experimental evidence of a thermally-driven amplitude-frequency nonlinearity in a thin-film quartz phononic crystal resonator at millikelvin temperatures. The nonlinear response arises from the coupling of the mechanical mode to an ensembl...
Geometric phase of exceptional point as quantum resonance in complex scaling method
Okuto Morikawa, Shoya Ogawa, Soma Onoda·Dec 31, 2025
Non-Hermitian operators and exceptional points (EPs) are now routinely realized in few-mode systems such as optical resonators and superconducting qubits. However, their foundations in genuine scattering problems with unbounded Hamiltonians remain mu...
Quantum Computing Inspired Approach for Self-Avoiding Walk (SAWs): 2D lattice and 3D lattice SAWs for single chain enumeration
Hemant Mishra, Shubham Singh, Rajeev Singh +1 more·Dec 31, 2025
We investigate the application of quantum computing algorithms to enhance the efficiency of enumerating self-avoiding walks (SAWs), utilizing quantum properties such as superposition and interference. A Quantum Amplitude Estimation (QAE)-based algori...
Multidimensional derivative-free optimization. A case study on minimization of Hartree-Fock-Roothaan energy functionals
A. Bagci·Dec 30, 2025
This study presents an evaluation of derivative-free optimization algorithms for the direct minimization of Hartree-Fock-Roothaan energy functionals involving nonlinear orbital parameters and quantum numbers with noninteger order. The analysis focuse...