Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Statistical mechanics from quantum envariance and exchange symmetry
Amul Ojha, Shubhit Sardana, Arnab Ghosh·Oct 29, 2025
We build on the foundational work of Deffner and Zurek [S. Deffner and W. H. Zurek, New J. Phys. 18, 063013 (2016)] to show how central equilibrium structures of statistical mechanics can be understood within standard quantum mechanics using the conc...
Decoder Switching: Breaking the Speed-Accuracy Tradeoff in Real-Time Quantum Error Correction
Riki Toshio, Kaito Kishi, Jun Fujisaki +3 more·Oct 29, 2025
The realization of fault-tolerant quantum computers hinges on the construction of high-speed, high-accuracy, real-time decoding systems. The persistent challenge lies in the fundamental trade-off between speed and accuracy: efforts to improve the dec...
Universal Limits on Quantum Correlations
Samuel Alperin·Oct 28, 2025
Quantum correlations are the singular, defining resource of quantum information science and metrology, forming the basis of every operational advantage that quantum systems hold over classical ones. Yet exact bounds on these correlations-such as the ...
Structure, Optimality, and Symmetry in Shadow Unitary Inversion
Guocheng Zhen, Yu-Ao Chen, Mingrui Jing +3 more·Oct 28, 2025
Reversing unitary operations is a key task in quantum computing and quantum control. In this work, we introduce and develop the framework of shadow unitary inversion, a relaxed variant of unitary inversion in which the goal is to reproduce the action...
A Euclidean Monte-Carlo-informed route to ground-state preparation for quantum simulation of scalar field theory
Navya Gupta, Christopher David White, Zohreh Davoudi·Oct 28, 2025
Quantum simulators hold great promise for studying real-time (Minkowski) dynamics of quantum field theories. Nonetheless, preparing non-trivial initial states remains a major obstacle. Euclidean-time Monte-Carlo methods yield ground-state spectra and...
Fields of covariances on non-commutative probability spaces in finite dimensions
Florio M. Ciaglia, Fabio Di Cosmo, Laura González-Bravo·Oct 28, 2025
We introduce the notion of a field of covariances, a contravariant functor from non-commutative probability spaces to Hilbert spaces, as the natural categorical analogue of statistical covariance. In the case of finite-dimensional non-commutative pro...
From Quantum Relative Entropy to the Semiclassical Einstein Equations
Philipp Dorau, Albert Much·Oct 28, 2025
We provide arguments indicating that the semiclassical Einstein equations follow from quantum relative entropy and its proportionality to an area variation. Using modular theory, we establish that the relative entropy between the vacuum state and coh...
Fundamental limit on the heralded single photons' spectral brightness
Tse-Yu Lin, Wei-Kai Huang, Pei-Yu Tu +2 more·Oct 28, 2025
The heralded single photons' (HSPs) spectral brightness (SB) is defined as the generation rate per linewidth. As the generation rate of HSPs gets larger or the photons' linewidth becomes narrower, both of which are desirable in quantum information pr...
Emergent Bell-Triplet State in Proton-Proton Scattering
Z. X. Shen, H. Y. Shang, Y. G. Ma +5 more·Oct 28, 2025
Entanglement is a key resource in quantum information science, yet its properties and applications in nuclear systems remain largely unexplored. Here, using proton-proton scattering as a quantum laboratory, we report the emergence of a near-pure Bell...
Optimizing Quantum Compilation via High-Level Quantum Instructions
Evandro C. R. Rosa, Jerusa Marchi, Eduardo I. Duzzioni +1 more·Oct 28, 2025
Current quantum programming is dominated by low-level, circuit-centric approaches that limit the potential for compiler optimization. This work presents how a high-level programming construct provides compilers with the semantic information needed fo...
Separability Criteria of Quantum States based on Generalized Bloch Representation
Linwei Li, Hongmei Yao, Chunlin Yang +1 more·Oct 28, 2025
Quantum entanglement serves as a fundamental resource in quantum information theory. This paper presents a comprehensive framework of separability criteria for detecting entanglement across quantum systems, from bipartite to multipartite states. We p...
Topological protection of photon-pair generation in nonlinear waveguide arrays
A. Zecchetto, J. -R. Coudevylle, M. Morassi +4 more·Oct 27, 2025
Harnessing topological effects offers a promising route to protect quantum states of light from imperfections, potentially enabling more robust platforms for quantum information processing. This capability is particularly relevant for active photonic...
Quantum Information at the Electron-Ion Collider
Kun Cheng, Tao Han, Sokratis Trifinopoulos·Oct 27, 2025
We investigate quantum-information-theoretic observables in electron-proton scattering at the Electron-Ion Collider (EIC). Our analysis focuses on entanglement and magic, two complementary indicators of non-classicality in quantum states. We show tha...
Thermodynamic work capacity of quantum information processing
Himanshu Badhani, Dhanuja G S, Siddhartha Das·Oct 27, 2025
We introduce the resource-theoretic free energy of a quantum channel as the maximal work extractable from the channel as its output equilibrates to a thermal state and its reference system remains locally intact. It is proportional to the relative en...
The Enigma of Delayed Choice Quantum Eraser
Tabish Qureshi·Oct 27, 2025
The delayed-choice quantum eraser represents an interesting experiment that exemplifies Bohr's principle of complementarity in a beautiful way. According to the complementarity principle, in a two-path interference experiment, the knowledge of which ...
SQOUT: A Risk-Based Threat Analysis Framework for Quantum Communication Systems
Michal Krelina, Tom Sorger, Bob Dirks·Oct 27, 2025
This paper addresses the urgent need for a cybersecurity framework tailored to quantum communication systems as the world transitions to quantum-safe infrastructures. While quantum communication promises unbreakable security, real-world deployments a...
Free-space quantum interface of a single atomic tweezer array with light
Yakov Solomons, Roni Ben-Maimon, Arpit Behera +3 more·Oct 27, 2025
We present a practical approach for interfacing light with a two-dimensional atomic tweezer array. Typical paraxial fields are poorly matched to the array's multi-diffraction-order radiation pattern, thus severely limiting the interface coupling effi...
Ultra-high-rate detection of entangled photon pairs
Toshimori Honjo, Shigeyuki Miyajima, Shigehito Miki +5 more·Oct 27, 2025
The high-rate detection of entangled photons is essential for advancing photonic quantum information processing. Although several experimental demonstrations have been reported, the achievable coincidence rates have so far remained limited. One of th...
Universal Decay of Mutual Information and Conditional Mutual Information in Gapped Pure- and Mixed-State Quantum Matter
Jinmin Yi, Kangle Li, Chuan Liu +2 more·Oct 26, 2025
For spin and fermionic systems in any spatial dimension, we establish that the superpolynomial decay behavior of mutual information and conditional mutual information is a universal property of gapped pure- and mixed-state phases; i.e., all systems i...
The Gravitational Aspect of Information: The Physical Reality of Asymmetric "Distance"
Tomoi Koide, Armin van de Venn·Oct 26, 2025
We show that when a Brownian bridge is physically constrained to satisfy a canonical condition, its time evolution exactly coincides with an m-geodesic on the statistical manifold of Gaussian distributions. This identification provides a direct physi...