Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Casimir interactions as a probe of broadband optical response
Calum F. Shelden, Jeremy N. Munday·Jan 15, 2026
Casimir forces arise from quantum electromagnetic fluctuations and depend on the dielectric response of interacting materials across the entire frequency spectrum. Although this dependence is central to Lifshitz theory of the Casimir effect, the form...
Optimal qudit overlapping tomography and optimal measurement order
Shuowei Ma, Qianfan Wang, Lvzhou Li +1 more·Jan 15, 2026
Quantum state tomography is essential for characterizing quantum systems, but it becomes infeasible for large systems due to exponential resource scaling. Overlapping tomography addresses this challenge by reconstructing all $k$-body marginals using ...
Double Markovity for quantum systems
Masahito Hayashi, Jinpei Zhao·Jan 15, 2026
The subadditivity-doubling-rotation (SDR) technique is a powerful route to Gaussian optimality in classical information theory and relies on strict subadditivity and its equality-case analysis, where double Markovity is a standard tool. We establish ...
Quantum Optical Inspired Models for Unitary Black Hole Evaporation
Paul M. Alsing·Jan 14, 2026
In this work, we describe optically inspired models for unitary black hole (BH) evaporation. The goal of these models are (i) to be operationally simple, (ii) approximately preserve the thermal nature of the emitted Hawking Radiation (HR), and (iii) ...
Localization of quantum states within subspaces
L. L. Salcedo·Jan 14, 2026
A precise definition is proposed for the localization probability of a quantum state within a given subspace of the full Hilbert space of a quantum system. The corresponding localized component of the state is explicitly identified, and several mathe...
Generation of Large Coherent-State Superpositions in Free-Space Optical Pulses
Lucas Caron, Hector Simon, Hugo Basset +2 more·Jan 14, 2026
The generation of non-Gaussian quantum states is a key requirement for universal continuous-variable quantum information processing. We report the experimental generation of large-amplitude squeezed coherent-state superpositions (squeezed cat states)...
A perturbative non-Markovian treatment to low-temperature spin decoherence
Timothy J. Krogmeier, Anthony W. Schlimgen, Kade Head-Marsden·Jan 14, 2026
Molecular spins are promising candidates for quantum information science, leveraging coherent electronic spin states for quantum sensing and computation. However, the practical application of these systems is hindered by electronic spin decoherence, ...
Quantum properties of heavy-fermion pairs at a lepton collider with polarised beams
Mohammad Mahdi Altakach, Priyanka Lamba, Fabio Maltoni +1 more·Jan 14, 2026
We investigate the quantum properties of heavy-fermion pairs, such as $t\bar t$ or $τ^+τ^-$, produced in lepton-lepton collisions with polarised beams. Focusing on spin correlations, entanglement, Bell-inequality violation, and quantum-information-th...
Geometry- and Topology-Informed Quantum Computing: From States to Real-Time Control with FPGA Prototypes
Gunhee Cho·Jan 14, 2026
This book gives a geometry-first, hardware-aware route through quantum-information workflows, with one goal: connect states, circuits, and measurement to deterministic classical pipelines that make hybrid quantum systems run. Part 1 develops the back...
A game-theoretic probability approach to loopholes in CHSH experiments
Takara Nomura, Koichi Yamagata, Akio Fujiwara·Jan 14, 2026
We study the CHSH inequality from an informational, timing-sensitive viewpoint using game-theoretic probability, which avoids assuming an underlying probability space. The locality loophole and the measurement-dependence (``freedom-of-choice'') looph...
A Posteriori Certification Framework for Generalized Quantum Arimoto-Blahut Algorithms
Geng Liu, Masahito Hayashi·Jan 14, 2026
The generalized quantum Arimoto--Blahut (QAB) algorithm is a powerful derivative-free iterative method in quantum information theory. A key obstacle to its broader use is that existing convergence guarantees typically rely on analytical conditions th...
Bidirectional Decoding for Concatenated Quantum Hamming Codes
Chao Zhang, Zipeng Wu, Jiahui Wu +1 more·Jan 14, 2026
High-rate concatenated quantum codes offer a promising pathway toward fault-tolerant quantum computation, yet designing efficient decoders that fully exploit their error-correction capability remains a significant challenge. In this work, we introduc...
Distributed Exact Quantum Amplitude Amplification Algorithm for Arbitrary Quantum States
Xu Zhou, Wenxuan Tao, Keren Li +1 more·Jan 14, 2026
In the noisy intermediate-scale quantum (NISQ) era, distributed quantum computation has garnered considerable interest, as it overcomes the physical limitations of single-device architectures and enables scalable quantum information processing. In th...
Simultaneous nondestructive measurement of many polar molecules using Rydberg atoms
Jeremy T. Young, Kang-Kuen Ni, Alexey V. Gorshkov·Jan 13, 2026
Tweezer arrays of polar molecules present new opportunities for quantum science and quantum information. However, a major challenge, especially in bialkali molecule platforms, is the fact that current measurement schemes for the internal states are d...
A 10 Megahertz Spatial Light Modulator
Xin Wei, Zeyang Li, Abhishek V. Karve +3 more·Jan 13, 2026
Rapid and programmable shaping of light fields is central to modern microscopy, display technologies, optical communications and sensing, quantum engineering, and quantum information processing. Current wavefront shaping technologies face a fundament...
Optimal logical Bell measurements on stabilizer codes with linear optics
Simon D. Reiß, Peter van Loock·Jan 13, 2026
Bell measurements (BMs) are ubiquitous in quantum information and technology. They are basic elements for quantum commmunication, computation, and error correction. In particular, when performed on logical qubits encoded in physical photonic qubits, ...
Fragility of Optimal Measurements due to Noise in Probe States for Quantum Sensing
Andrew Kolmer Forbes, Marco A. Rodríguez-García, Ivan H. Deutsch·Jan 13, 2026
For a given quantum state used in sensing, the quantum Cramér-Rao bound (QCRB) sets a fundamental limit on the precision achievable by an unbiased estimator of an unknown parameter, determined by the inverse of the quantum Fisher information (QFI). T...
Phase-sensitive superposition of quantum states
Xiaotong Wang, Shunlong Luo, Yue Zhang·Jan 13, 2026
Although the principle of superposition lies at the heart of quantum mechanics and is the root of almost all quantum phenomena such as coherence and entanglement, its quantification, except for that related to the resource theory of coherence and int...
Extending Qubit Coherence Time via Hybrid Dynamical Decoupling
Qi Yao, Jun Zhang, Wenxian Zhang +1 more·Jan 13, 2026
Dynamical decoupling (DD) and bath engineering are two parallel techniques employed to mitigate qubit decoherence resulting from their unavoidable coupling to the environment. Here, we present a hybrid DD approach that integrates pulsed DD with bath ...
Efficient and broadband quantum frequency comb generation in a monolithic AlGaAs-on-insulator microresonator
Xiaodong Zheng, Xu Jing, Chenbo Liu +9 more·Jan 13, 2026
The exploration of photonic systems for quantum information processing has generated widespread interest in multiple cutting-edge research fields. Photonic frequency encoding stands out as an especially viable approach, given its natural alignment wi...