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Live trends in quantum computing research, updated daily from arXiv.
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Neural network approximation of regularized density functionals
Mihály A. Csirik, Andre Laestadius, Mathias Oster·Nov 23, 2025
Density functional theory is one of the most efficient and widely used computational methods of quantum mechanics, especially in fields such as solid state physics and quantum chemistry. From the theoretical perspecive, its central object is the univ...
Universal learning of nonlocal entropy via local correlations in non-equilibrium quantum states
Hao Liao, Xuanqin Huang, Ping Wang·Nov 23, 2025
Characterizing the nonlocal nature of quantum states is a central challenge in the practical application of large-scale quantum computation and simulation. Quantum mutual information (QMI), a fundamental nonlocal measure, plays a key role in quantify...
Doublon bound states in the continuum through giant atoms
Walter Rieck, Anton Frisk Kockum, Guangze Chen·Nov 22, 2025
Bound states in the continuum (BICs) are spatially localized modes embedded in the spectrum of extended states, typically stabilized by symmetry or interference. While extensively studied in single-particle and linear systems, the many-body regime of...
Optimal Thermalization under Indefinite Causal Order with Identical and Asymmetric Baths
Neeraj Sharma, Parveen Kumar·Nov 21, 2025
Indefinite causal order (ICO), in which the order of quantum operations is placed in a coherent superposition, has been demonstrated to enhance various information-processing tasks. Here, we investigate its impact on the thermodynamic processes gener...
Parameter Inference from Final-State Entanglement in Higgs Decays
Jia Liu, Masanori Tanaka, Xiao-Ping Wang +2 more·Nov 21, 2025
The decay out-states of unstable Standard Model (SM) particles provide a unique, well-defined intrinsic quantum-information probe of the SM parameter space. We use Higgs decays as a test case: after tracing out kinematics, we compute entanglement amo...
Optical Entanglement Facilitated by Opto-Mechanical Cooling
Alexandr V. Karpenko, Andrey B. Matsko, Sergey P. Vyatchanin·Nov 21, 2025
Optomechanical generation of entangled optical beams is usually hindered by thermal noise. We present a theoretical study of low frequency entanglement generation between two optical harmonics emitted from a cavity optomechanical system operating in ...
Witnesses of Genuine Multipartite Entanglement and Nonlocal Measurement Back-action for Raman-scattering Quantum Systems
Kai Ryen Bush, Kjetil Børkje·Nov 21, 2025
Entanglement between remote quantum mechanical systems enables a range of quantum information tasks in communication, computation and distributed sensing. Large numbers of entangled subsystems also require experimentally accessible and practically fe...
Theoretical Analysis of Photonic Resonances in Spectroscopic Measurements of a Kerr Nonlinear Resonator
Yuki Tanaka, Aiko Yamaguchi, Tomohiro Yamaji +4 more·Nov 21, 2025
The Kerr parametric oscillator (KPO) has recently attracted considerable attention from the perspective of its applications to quantum information processing, and understanding its properties is an important challenge. Spectroscopic measurements serv...
Bell state analysis using orbital angular momentum and path degrees of freedom
Zi-Long Yang, Shi-Wen He, Lin-Cheng Wang +4 more·Nov 21, 2025
Bell state analysis (BSA) constitutes a foundational operation for distinguishing Bell states in numerous quantum information processing (QIP) protocols. In this work, we propose a theoretical scheme for realizing a perfect BSA tailored for polarized...
All steerable quantum correlations can provide thermodynamic advantages in cooling
Tanmoy Biswas, Chandan Datta, Luis Pedro Garcia-Pintos·Nov 21, 2025
The removal of heat generated during computation poses a major challenge for both classical and quantum information processing. In particular, heat removal is directly linked to a fundamental requirement of quantum computation: the ability to reset a...
Broadband telecom single-photon emissions from InAs/InP quantum dots grown by MOVPE droplet epitaxy
Shichen Zhang, Li Liu, Kai Guo +6 more·Nov 21, 2025
The development of quantum materials for single-photon emission is crucial for the advancement of quantum information technology. Although significant advancement has been witnessed in recent years for single photon sources in near infrared band (λ~7...
The Star Product of Uniformly Random Codes
Johan V. Dinesen, Ragnar Freij, Camilla Hollanti +2 more·Nov 21, 2025
We consider the problem of determining the expected dimension of the star product of two uniformly random linear codes that are not necessarily of the same dimension. We achieve this by establishing a correspondence between the star product and the e...
Coherence and contextuality as quantum resources
Rafael Wagner·Nov 20, 2025
In this thesis, we explore the intersection of two fundamental subfields of quantum information theory: quantum coherence and contextuality. Despite their apparent differences, both areas address key issues relevant to the foundations and application...
Navigating the Quantum Resource Landscape of Entropy Vector Space Using Machine Learning and Optimization
Nothando Khumalo, Aman Mehta, William Munizzi +1 more·Nov 20, 2025
We present a machine learning framework to study the dynamics of entropy vectors and quantum resources, including entanglement and magic, focusing on violations of entropy inequalities. Using a reinforcement learning agent formulated as a Markov deci...
Variational Quantum Integrated Sensing and Communication
Ivana Nikoloska, Osvaldo Simeone·Nov 20, 2025
The integration of sensing and communication functionalities within a common system is one of the main innovation drivers for next-generation networks. In this paper, we introduce a quantum integrated sensing and communication (QISAC) protocol that l...
Quantum speed limit for observables from quantum asymmetry
Agung Budiyono, Michael Moody, Hadyan L. Prihadi +2 more·Nov 20, 2025
Quantum asymmetry and coherence are genuinely quantum resources that are essential to realize quantum advantage in information technologies. However, all quantum processes are fundamentally constrained by quantum speed limits, which raises the questi...
Optimizing Quantum Key Distribution Network Performance using Graph Neural Networks
Akshit Pramod Anchan, Ameiy Acharya, Leki Chom Thungon·Nov 20, 2025
This paper proposes an optimization of Quantum Key Distribution (QKD) Networks using Graph Neural Networks (GNN) framework. Today, the development of quantum computers threatens the security systems of classical cryptography. Moreover, as QKD network...
Identifying the $3$-qubit $W$ state with quantum uncertainty relation
Zhi-Jie Liu, Hao-Nan Qiang, Jie Zhou +2 more·Nov 20, 2025
The $W$ state, a canonical representative of multipartite quantum entanglement, plays a crucial role in quantum information science due to its robust entanglement properties. Quantum uncertainty relations, on the other hand, are a fundamental corners...
Exceptional-Point-Induced Sensitivity-Robustness Phase Transition in Quantum Interference
Xing Lin, Shuang Zhang·Nov 20, 2025
Quantum interference underpins many quantum information protocols but is typically studied in lossless Hermitian systems. Here, we reveal an exceptional point induced phase transition in two photon Hong Ou Mandel interference within a lossy coupled w...
Tripartite Entanglement Generation in Atom-Coupled Dual Microresonators System
Abhishek Mandal, Joy Ghosh, Maruthi Manoj Brundavanam +1 more·Nov 20, 2025
In this work, we investigate the emergence and control of genuine tripartite entanglement in a hybrid cavity quantum electrodynamics architecture consisting of two linearly coupled single mode resonators, one of which interacts coherently with a two ...