Papers
Live trends in quantum computing research, updated daily from arXiv.
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MPM-QIR: Measurement-Probability Matching for Quantum Image Representation and Compression via Variational Quantum Circuit
Chong-Wei Wang, Mei Ian Sam, Tzu-Ling Kuo +2 more·Jan 7, 2026
We present MPM-QIR, a variational-quantum-circuit (VQC) framework for classical image compression and representation whose core objective is to achieve equal or better reconstruction quality at a lower Parameter Compression Ratio (PCR). The method al...
Interference-Induced Suppression of Doublon Transport and Prethermalization in the Extended Bose-Hubbard Model
Zhen-Ting Bao, Kai Xu, Heng Fan·Jan 7, 2026
The coherent mobility of doublons, arising from second-order virtual dissociation-recombination processes, fundamentally limits their use as information carriers in the strongly interacting Bose-Hubbard model. We propose a disorder-free suppression m...
Double interval entanglement in quasiparticle excited states
Zhouhao Guo, Jiaju Zhang·Jan 7, 2026
We investigate double-interval entanglement measures, specifically reflected entropy, mutual information, and logarithmic negativity, in quasiparticle excited states for classical, bosonic, and fermionic systems. We develop an algorithm that efficien...
Non-Markovian dynamics of the giant atom beyond the rotating-wave approximation
Mei Yu, Walter T. Strunz, Stefan Nimmrichter·Jan 6, 2026
Superconducting qubits coupled to meandering transmission lines or surface acoustic waves may realize giant artificial atoms, whose spatially separated coupling points give rise to long-lived non-Markovian dynamics. Previous studies were limited to t...
Does relativistic motion really freeze initially maximal entanglement?
Si-Han Li, Hui-Chen Yang, Rui-Yang Xu +1 more·Jan 6, 2026
We investigate the relativistic dynamics of quantum entanglement in a four-qubit cluster ($CL_4$) state using a fully operational Unruh-DeWitt detector framework. Contrary to the widely held expectation that the Unruh effect inevitably degrades initi...
Duality and measurement: the Copenhagen reconciliation
Vincenzo Chilla·Jan 6, 2026
Duality, not monism, constitutes the hermeneutic lens that characterizes the original Copenhagen interpretation of Quantum Mechanics. Therefore, evoking the principles of correspondence and complementarity, in this work we re-assert a dual-aspect rea...
Trading symmetry for Hilbert-space dimension in Bell-inequality violation
Hsin-Yu Hsu, Gelo Noel M. Tabia, Kai-Siang Chen +4 more·Jan 6, 2026
In quantum information, asymmetry, i.e., the lack of symmetry, is a resource allowing one to accomplish certain tasks that are otherwise impossible. Similarly, in a Bell test using any given Bell inequality, the maximum violation achievable using qua...
Quantum key distribution without authentication and information leakage
Zixuan Hu, Zhenyu Li·Jan 6, 2026
Quantum key distribution (QKD) is the most widely studied quantum cryptographic model that exploits quantum effects to achieve information-theoretically secure key establishment. Conventional QKD contains public classical post-processing steps that r...
Q-based, objective-field model for wave-function collapse: Analyzing measurement on a macroscopic superposition state
Channa Hatharasinghe, Ashleigh Willis, Run Yan Teh +2 more·Jan 6, 2026
The measurement problem remains unaddressed in modern physics, with an array of proposed solutions but as of yet no agreed resolution. In this paper, we examine measurement using the Q-based, objective-field model for quantum mechanics. Schrodinger c...
Schwarz maps with symmetry
Alfonso García-Velo, Alberto Ibort·Jan 5, 2026
The theory of symmetry of quantum mechanical systems is applied to study the structure and properties of several classes of relevant maps in quantum information theory: CPTP, PPT and Schwarz maps. First, we develop the general structure that equivari...
A General Class of Functionals for Certifying Quantum Incompatibility
Kuan-Yi Lee, Jhen-Dong Lin, Adam Miranowicz +1 more·Jan 5, 2026
Quantum steering, measurement incompatibility, and instrument incompatibility have recently been recognized as unified manifestations of quantum incompatibility. Building on this perspective, we develop a general framework for constructing optimizati...
Efficient Calculation of the Maximal Rényi Divergence for a Matrix Product State via Generalized Eigenvalue Density Matrix Renormalization Group
Uri Levin, Noa Feldman, Moshe Goldstein·Jan 5, 2026
The study of quantum and classical correlations between subsystems is fundamental to understanding many-body physics. In quantum information theory, the quantum mutual information, $I(A;B)$, is a measure of correlation between the subsystems $A,B$ in...
Enhancing Object Detection with Privileged Information: A Model-Agnostic Teacher-Student Approach
Matthias Bartolo, Dylan Seychell, Gabriel Hili +4 more·Jan 5, 2026
This paper investigates the integration of the Learning Using Privileged Information (LUPI) paradigm in object detection to exploit fine-grained, descriptive information available during training but not at inference. We introduce a general, model-ag...
Absolutely Maximal Contextual Correlations
Nripendra Majumdar, S. Aravinda·Jan 5, 2026
The foundational work by Bell led to an interest in understanding non-local correlations that arise from entangled states shared between distinct, spacelike-separated parties, which formed a foundation for the theory of quantum information processing...
Parallel Quantum Gates via Scalable Subsystem-Optimized Robust Control
Xiaodong Yang, Ran Liu, Jun Li·Jan 5, 2026
Accurate and efficient implementation of parallel quantum gates is crucial for scalable quantum information processing. However, the unavoidable crosstalk between qubits in current noisy processors impedes the achievement of high gate fidelities and ...
Continuous Unitary Designs for Universally Robust Quantum Control
Xiaodong Yang, Jiaqing Leng, Jun Li·Jan 5, 2026
Unitary designs are unitary ensembles that emulate Haar-random unitary statistics. They provide a vital tool for studying quantum randomness and have found broad applications in quantum technologies. However, existing research has focused on discrete...
Experimental realization of quantum Zeno dynamics for robust quantum metrology
Ran Liu, Xiaodong Yang, Xiang Lv +5 more·Jan 5, 2026
Quantum Zeno dynamics (QZD), which restricts the system's evolution to a protected subspace, provides a promising approach for protecting quantum information from noise. Here, we explore a practical approach to harnessing QZD for robust quantum metro...
High-Resolution Spectroscopy of the X-A Transition of the Carbon Monoxide Dication CO$^{2+}$
X. Huet, A. Aerts, N. Vaeck +2 more·Jan 5, 2026
We report rovibronic spectra of the A $^3Σ^+$($v'=0-2$) - X $^3Π_Ω(v=0)$ rovibronic transitions ($|Ω|=0, 1$ and 2) of the CO$^{2+}$ doubly-charged molecular ion. Spectra were recorded at high resolution ($\sim 5$~cm$^{-1}$) in a fast beam of CO$^{2+}...
Interpretation of Unfair Sampling in Quantum Annealing by Node Centrality
Naoki Maruyama, Masayuki Ohzeki·Jan 5, 2026
In applications where multiple optimal solutions are needed, transverse-field quantum annealing (QA) is known to sample degenerate ground states in a strongly biased manner. Despite extensive empirical observations, it remains unclear which features ...
Pervasive Vulnerability Analysis and Defense for QKD-based Quantum Private Query
Xiaoyu Peng, Bin Liu, Shiyu He +4 more·Jan 5, 2026
Quantum Private Query (QPQ) based on Quantum Key Distribution (QKD) is among the most practically viable quantum communication protocols, with application value second only to QKD itself. However, prevalent security vulnerabilities in the post-proces...