Papers
Live trends in quantum computing research, updated daily from arXiv.
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Quantum Advantage in Learning Mixed Unitary Channels
Yue Tu, Liang Jiang·Nov 17, 2025
We study the task of learning mixed unitary channels using Fisher information, under different quantum resource assumptions including ancilla and concatenation. Our result shows that the asymptotic sample complexity scales as $\frac{r}{d\varepsilon^2...
Long-range entanglement and quantum correlations in a multi-frequency comb system
Sahil Pontula, Debasmita Banerjee, Marin Soljacic +1 more·Nov 17, 2025
Frequency combs are multimode photonic systems that underlie countless precision sensing and metrology applications. Since their invention over two decades ago, numerous efforts have pushed frequency combs to broader bandwidths and more stable operat...
Thermodynamics of the Fermi-Hubbard Model through Stochastic Calculus and Girsanov Transformation
Detlef Lehmann·Nov 17, 2025
We apply the methodology of our recent paper 'The Dynamics of the Hubbard Model through Stochastic Calculus and Girsanov Transformation' [1] to thermodynamic correlation functions in the Fermi-Hubbard model. They can be obtained from a stochastic dif...
Simultaneous variances of Pauli strings, weighted independence numbers, and a new kind of perfection of graphs
Zhen-Peng Xu, Jie Wang, Qi Ye +3 more·Nov 17, 2025
A set of Pauli stings is well characterized by the graph that encodes its commutatitivity structure, i.e., by its frustration graph. This graph provides a natural interface between graph theory and quantum information, which we explore in this work. ...
Extracting Photon-Number Information from Superconducting Nanowire Single-Photon Detectors Traces via Mean-Derivative Projection
I. S. Kuijf, F. B. Baalbergen, L. Seldenthuis +2 more·Nov 17, 2025
Photon-number resolved detection with superconducting nanowire single-photon detectors (SNSPDs) attracts increasing interest, but lacks a systematic framework for interpreting and benchmarking this capability. In this work, we combine principal compo...
Probing parameters estimation with Gaussian non-commutative measurements
Alice P. G. Hall, Carlos H. S. Vieira, Jonas F. G. Santos·Nov 17, 2025
Gaussian quantum states and channels are pivotal across many branches of quantum science and their applications, including the processing and storage of quantum information, the investigation of thermodynamics in the quantum regime, and quantum compu...
Efficient algorithm for fidelity estimation of two quantum states
Anumita Mukhopadhyay, Shibdas Roy, Arun Kumar Pati·Nov 17, 2025
The fidelity estimation between two quantum states is crucial for quantum computation and information science. However, an efficacious method for this, especially for mixed states and higher-dimensional density matrices, remains elusive. While there ...
Floquet Recurrences in the Double Kicked Top
Avadhut V. Purohit, Udaysinh T. Bhosale·Nov 17, 2025
We study exact quantum recurrences in the double kicked top (DKT), a driven spin model that extends the quantum kicked top (QKT) by introducing an additional time-reversal symmetry-breaking kick. Reformulating its dynamics in terms of effective param...
Quantum Mpemba Effect Induced by Non-Markovian Exceptional Points
Ze-Zhou Zhang, Hong-Gang Luo, Wei Wu·Nov 17, 2025
Quantum Mpemba effect describes an anomalous phenomenon of accelerated relaxation which is of fundamental interest in the field of nonequilibrium thermodynamics. Conventional theories on this phenomenon strongly rely on the Born-Markovian approximati...
A note on Schmidt-number witnesses based on symmetric measurements
Xiao-Qian Mu, Hao-Fan Wang, Shao-Ming Fei·Nov 17, 2025
The Schmidt number is an important kind of characterization of quantum entanglement. Quantum states with higher Schmidt numbers demonstrate significant advantages in various quantum information processing tasks. By deriving a class of k-positive line...
The role of averages in CV-QKD over fast fading channels
Miguel Castillo-Celeita, Matteo Schiavon·Nov 16, 2025
This work presents a study of continuous-variable quantum key distribution (CV-QKD) protocols over fast-fading channels, typically found in free-space communication links. Two eavesdropping models are considered to evaluate their security under colle...
Moments of quantum channel ensembles
Matthew Duschenes, Diego García-Martín, Zoë Holmes +1 more·Nov 16, 2025
Moments of ensembles of unitaries play a central role in quantum information theory as they capture the statistical properties of dynamics of systems with some form of randomness. Indeed, concepts such as approximate $t$-designs arise when comparing ...
Dissipative Dynamics of Charged Graphene Quantum Batteries
Disha Verma, Indrajith VS, R. Sankaranarayanan·Nov 16, 2025
We investigate dissipative dynamics in a graphene-based quantum battery modeled as a four level spin valley system. The battery is charged via a Gaussian pulse and subsequently evolves under amplitude damping, dephasing, and both Markovian and non Ma...
Sparsity-Driven Entanglement Detection in High-Dimensional Quantum States
Stav Lotan, Hugo Defienne, Ronen Talmon +1 more·Nov 16, 2025
The characterization of high-dimensional quantum entanglement is crucial for advanced quantum computing and quantum information algorithms. Traditional methods require extensive data acquisition and suffer from limited visibility due to experimental ...
Comparison of Mathematical Models for Subscription Services Using Optimization Problems and Quantum Information Theory -Feasibility of Implementing Optimization Problem Algorithms on Quantum Computers-
Misao Fukuda·Nov 16, 2025
The purpose of this research is to explore whether it is possible to construct a design theory for subscription services for intangible goods from a time discounting perspective, based on quantum information theory, which is the foundational theory f...
Machine Learning Framework for Efficient Prediction of Quantum Wasserstein Distance
Changchun Feng, Xinyu Qiu, Laifa Tao +1 more·Nov 16, 2025
The quantum Wasserstein distance (W-distance) is a fundamental metric for quantifying the distinguishability of quantum operations, with critical applications in quantum error correction. However, computing the W-distance remains computationally chal...
Optimal Multiparameter Quantum Estimation of Magnonic Couplings in a Magnomechanical Cavity
Adnan Naimy, Abdallah Slaoui, Abderrahim Lakhfif +1 more·Nov 15, 2025
In this work, we introduce an experimentally viable scheme to enhance the simultaneous estimation precision of the couplings $G_{mc}$ and $G_{mb}$, with a particular focus on the performance of heterodyne detection. By comparing simultaneous and indi...
Dyadic-Chaotic Lifting S-Boxes for Enhanced Physical-Layer Security within 6G Networks
Ilias Cherkaoui, Indrakshi Dey·Nov 15, 2025
Sixth-Generation (6G) wireless networks will interconnect billions of resource-constrained devices and time-critical services, where classical, fixed, and heavy cryptography strains latency and energy budgets and struggles against large-scale, pre-co...
QMA Complete Quantum-Enhanced Kyber: Provable Security Through CHSH Nonlocality
Ilias Cherkaoui, Indrakshi Dey·Nov 15, 2025
Post-quantum cryptography (PQC) must secure large-scale communication systems against quantum adversaries where classical hardness alone is insufficient and purely quantum schemes remain impractical. Lattice-based key encapsulation mechanisms (KEMs) ...
An Improved Quantum Anonymous Notification Protocol for Quantum-Augmented Networks
Nitin Jha, Abhishek Parakh, Mahadevan Subramaniam·Nov 15, 2025
The scalability of current quantum networks is limited due to noisy quantum components and high implementation costs, thereby limiting the security advantages that quantum networks provide over their classical counterparts. Quantum Augmented Networks...