Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
High-performance quantum interconnect between bosonic modules beyond transmission loss constraints
Hongwei Huang, Jie Zhou, Weizhou Cai +12 more·Dec 31, 2025
Distributed quantum computing architectures require high-performance quantum interconnects between quantum information processing units, while previous implementations have been fundamentally limited by transmission line losses. Here, we demonstrate ...
Operator Entanglement from Non-Commutative Symmetries
Michele Arzano, Goffredo Chirco·Dec 31, 2025
We argue that Hopf-algebra deformations of symmetries -- as encountered in non-commutative models of quantum spacetime -- carry an intrinsic content of $operator$ $entanglement$ that is enforced by the coproduct-defined notion of composite generators...
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...
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...
Necessary and sufficient conditions for entropy vector realizability by holographic simple tree graph models
Veronika E. Hubeny, Massimiliano Rota·Dec 30, 2025
We prove that the ``chordality condition'', which was established in arXiv:2412.18018 as a necessary condition for an entropy vector to be realizable by a holographic simple tree graph model, is also sufficient. The proof is constructive, demonstrati...
The Wigner-Ville Transform as an Information Theoretic Tool in Radio-frequency Signal Analysis
Erik Lentz, Emily Ellwein, Bill Kay +2 more·Dec 30, 2025
This paper presents novel interpretations to the field of classical signal processing of the Wigner-Ville transform as an information measurement tool. The transform's utility in detecting and localizing information-laden signals amidst noisy and clu...
Detection of quantum entanglement across the event horizon
Patryk Michalski, Andrzej Dragan·Dec 30, 2025
We investigate the problem of distinguishing between separable and entangled states of two quantum wave packets, one of which falls into a black hole. Intuitively, one might expect the two scenarios to be indistinguishable, since the information carr...
Increased-Efficiency Multiple-Decoding-Attempts Error Correction for Continuous-Variable Quantum Key Distribution
Lukas Eisemann, Ömer Bayraktar, Stefan Richter +3 more·Dec 30, 2025
In continuous-variable quantum key distribution (CV-QKD), the performance of the information reconciliation (IR) step is critical for the achievable secret key rate (SKR) and transmission distance. We show how to improve on the recently introduced im...
Benasque Lectures on Gaussian Bosonic Systems and Analogue Gravity
Anthony J. Brady·Dec 30, 2025
These notes are adapted from six lectures that I delivered at Analogue Gravity in Benasque 2023. They present the unified Gaussian (phase-space) framework to describe linear bosonic quantum systems, the standard tool in quantum optics and continuous-...
Deterministic distribution of W-class states in quantum networks
Souvik Chatterjee, Prasenjit Deb, Chandan Datta +1 more·Dec 30, 2025
Multipartite entangled states possess a number of non-intuitive properties, making them a useful resource for various quantum information-processing tasks. The three-qubit W-state is one such example where every state is robust to single-qubit loss. ...
Entropic order parameters and topological holography
Hua-Chen Zhang, Germán Sierra, Javier Molina-Vilaplana·Dec 30, 2025
We show that the symmetry topological field theory (SymTFT) construction, also known as the topological holography, provides a natural and intuitive framework for the entropic order parameter characterising phases with (partially) broken symmetries. ...
Entanglement dynamics driven by topology and non-Hermiticity
Li-Wei Wang, Bolun Hu, Haixiao Zhang +3 more·Dec 30, 2025
The interplay between topology and non-Hermiticity gives rise to exotic dynamic phenomena that challenge conventional wave-packet propagation and entanglement dynamics. While recent studies have established the non-Hermitian skin effect (NHSE) as a k...
Path Integral Solution for Dissipative Generative Dynamics
Xidi Wang·Dec 30, 2025
Can purely mechanical systems generate intelligent language? We prove that dissipative quantum dynamics with analytically tractable non-local context aggregation produce coherent text generation, while conservation laws cause fundamental failure. Emp...
5-GHz chip-based quantum key distribution with 1Mbps secure key rate over 150 km
Guo-Wei Zhang, Sheng-Teng Zheng, You Xiao +16 more·Dec 30, 2025
Quantum key distribution (QKD) enables secure communication by harnessing the fundamental principles of quantum physics, which inherently guarantee information-theoretic security and intrinsic resistance to quantum computing attacks. However, the sec...
A new entanglement measure based on the total concurrence
Dong-Ping Xuan, Zhong-Xi Shen, Wen Zhou +2 more·Dec 30, 2025
Quantum entanglement is a crucial resource in quantum information processing, advancing quantum technologies. The greater the uncertainty in subsystems' pure states, the stronger the quantum entanglement between them. From the dual form of $q$-concur...
Exploring Spectral Singularities and Topological Lasers in PT-Symmetric Weyl Semimetals
Arda Sevinc, Rama Alassadi, Mustafa Sarisaman·Dec 30, 2025
This paper investigates the unique properties of PT-symmetric Topological Weyl Semimetals (TWS) within the framework of non-Hermitian physics, focusing on their potential for generating topological lasers. By exploring the role of spectral singularit...
Quantum Error Mitigation with Attention Graph Transformers for Burgers Equation Solvers on NISQ Hardware
Seyed Mohamad Ali Tousi, Adib Bazgir, Yuwen Zhang +1 more·Dec 29, 2025
We present a hybrid quantum-classical framework augmented with learned error mitigation for solving the viscous Burgers equation on noisy intermediate-scale quantum (NISQ) hardware. Using the Cole-Hopf transformation, the nonlinear Burgers equation i...
The operational no-signalling constraints and their implications
Michał Eckstein, Tomasz Miller, Ryszard Horodecki +2 more·Dec 29, 2025
The study of quantum correlations within relativistic spacetimes, and the consequences of relativistic causality on information processing using such correlations, has gained much attention in recent years. In this paper, we establish a unified frame...
Heisenberg-limited metrology from the quantum-quench dynamics of an anisotropic ferromagnet
Z. M. McIntyre, Ji Zou, Jelena Klinovaja +1 more·Dec 29, 2025
The emerging field of quantum magnonics seeks to understand and harness the quantum properties of magnons -- quantized collective spin excitations in magnets. Squeezed magnon states arise naturally as the equilibrium ground states of anisotropic ferr...
Paradox-free classical non-causality and unambiguous non-locality without entanglement are equivalent
Hippolyte Dourdent, Kyrylo Simonov, Andreas Leitherer +5 more·Dec 29, 2025
Closed timelike curves (CTCs) challenge our conception of causality by allowing information to loop back into its own past. Any consistent description of such scenarios must avoid time-travel paradoxes while respecting the no-new-physics principle, w...