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Live trends in quantum computing research, updated daily from arXiv.
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Towards Global Quantum Key Distribution
Haoran Zhang, Haotao Zhu, Ruihua He +4 more·Nov 14, 2025
Quantum Key Distribution (QKD) supports the negotiation and sharing of private keys with unconditional security between authorized parties. Over the years, theoretical advances and experimental demonstrations have successfully transitioned QKD from l...
Maximizing the nondemolition nature of a quantum measurement via an adaptive readout protocol
Arjen Vaartjes, Rocky Yue Su, Laura A. O'Neill +15 more·Nov 14, 2025
Quantum error correction (QEC) requires non-invasive measurements for fault tolerant quantum computing. Deviations from ideal quantum non-demolition (QND) measurements can disturb the encoded information. To address this challenge, we develop a reado...
Cycle Basis Algorithms for Reducing Maximum Edge Participation
Fan Wang, Sandy Irani·Nov 14, 2025
We study the problem of constructing cycle bases of graphs with low maximum edge participation, defined as the maximum number of basis cycles that share any single edge. This quantity, though less studied than total weight or length, plays a critical...
Probing universal imaginary-time relaxation critical dynamics with infinite projected entangled pair states
He-Yu Lin, Shuai Yin, Z. Y. Xie +1 more·Nov 14, 2025
We investigate the imaginary-time relaxation critical dynamics of the two-dimensional transverse-field Ising model using infinite projected entangled pair states (iPEPS) with the full-update strategy. Simulating directly in the thermodynamic limit, w...
A Compilation Framework for Quantum Circuits with Mid-Circuit Measurement Error Awareness
Ming Zhong, Zhemin Zhang, Xiangyu Ren +3 more·Nov 14, 2025
Mid-circuit measurement (MCM) provides the capability for qubit reuse and dynamic control in quantum processors, enabling more resource-efficient algorithms and supporting error-correction procedures. However, MCM introduces several sources of error,...
Spontaneous Macroscopic Quantum Synchronization in an Ensemble of Two-level Systems
Zhen-huan Yang, Dan-Bo Zhang·Nov 14, 2025
Spontaneous macroscopic quantum synchronization is an emergent phenomenon where an ensemble of quantum oscillators achieves global phase coherence through the interplay of interaction and dissipation. To illuminate this phenomenon, we study an ensemb...
Parametric resonance in a spin-1/2 chain: dynamical effects of nontrivial topology
Mahmoud T. Elewa, M. I. Dykman·Nov 14, 2025
Resonant parametric modulation is a major tool of studying magnetic systems. For a spin-1/2 chain in a strong magnetic field, the resulting excitations can be mapped on fermionic excitations in the Kitaev chain. We show that the response to the modul...
A New Quantum Secure Time Transfer System
Ravi Singh Adhikari, Aman Gupta, Anju Rani +2 more·Nov 13, 2025
High-precision clock synchronization is essential for a wide range of network-distributed applications. In the quantum space, these applications include communication, sensing, and positioning. However, current synchronization techniques are vulnerab...
Efficient quantum Gibbs sampling of stabilizer codes using hybrid computation
Ivan H. C. Shum, Angela Capel·Nov 13, 2025
We present hybrid Gibbs sampling algorithms for the stabilizer code Hamiltonians of the rotated surface code and the toric code with only local quantum algorithms, using $\sim L/2$ quantum circuit depth to prepare the Gibbs state of the rotated surfa...
Query complexities of quantum channel discrimination and estimation: A unified approach
Zixin Huang, Johannes Jakob Meyer, Theshani Nuradha +1 more·Nov 13, 2025
The goal of quantum channel discrimination and estimation is to determine the identity of an unknown channel from a discrete or continuous set, respectively. The query complexity of these tasks is equal to the minimum number of times one must call an...
A Versatile Variational Quantum Kernel Framework for Non-Trivial Classification
Jiang Yuhan, Matthew Otten·Nov 13, 2025
Quantum kernel methods are a promising branch of quantum machine learning, yet their effectiveness on diverse, high-dimensional, real-world data remains unverified. Current research has largely been limited to low-dimensional or synthetic datasets, p...
Universal Thermodynamic Uncertainty Relation for Quantum $f-$Divergences
Domingos S. P. Salazar·Nov 13, 2025
We show that any Petz $f$-divergence (where $f$ is operator convex) between quantum states admits a universal $χ^2$-mixture representation: the distinguishability of $ρ$ from $σ$ is obtained as a positive superposition of quadratic contrasts $χ^2_λ$,...
Microscopic theory of quantum physics
Dennis M. Heim·Nov 13, 2025
I present a microscopic framework in which quantum phenomena emerge from particle-particle interactions governed by Newton's second law of motion. Within this approach, stationary states and quantized energy spectra arise naturally for the particle i...
Correlated Purification for Restoring $N$-Representability in Quantum Simulation
Yuchen Wang, Irma Avdic, Michael Rose +4 more·Nov 13, 2025
Classical shadow tomography offers a scalable route to estimating properties of quantum states, but the resulting reduced density matrices (RDMs) often violate constraints that ensure they represent $N$-electron states -- known as $N$-representabilit...
Certifying the dimensionality of any quantum channel with minimal assumptions
Saheli Mukherjee, Bivas Mallick, Pratik Ghosal·Nov 13, 2025
High-dimensional entanglement offers significant advantages over low-dimensional ones in various information-processing tasks. However, to harness these advantages, it is crucial that the quantum channels used to store or transmit the subsystems of a...
Understanding the Nature of Depth-1 Equivariant Quantum Circuit
Jonathan Teo, Lee Xin Wei, Hoong Chuin Lau·Nov 13, 2025
The Equivariant Quantum Circuit (EQC) for the Travelling Salesman Problem (TSP) has been shown to achieve near-optimal performance in solving small TSP problems (up to 20 nodes) using only two parameters at depth 1. However, extending EQCs to larger ...
Optimal propagation distance for maximal biphoton entanglement through the weakly turbulent atmosphere
Luchang Niu, Saleem Iqbal, Yang Xu +1 more·Nov 13, 2025
Understanding the influence of atmospheric turbulence on the propagation of entangled biphoton states is essential for free-space quantum communication protocols. Using the extended Huygens-Fresnel principle and the Kolmogorov turbulence model, we de...
Diffusion in the stochastic Klein-Gordon equation
Jonathan Oppenheim, Emanuele Panella·Nov 13, 2025
Theories of gravity in which the metric is fundamentally classical predict stochastic fluctuations in the gravitational field. In this article, we study the stochastic Klein-Gordon equation as a starting point to understand the phenomenology of linea...
Entanglement boosting: Low-volume logical Bell pair preparation for distributed fault-tolerant quantum computation
Shinichi Sunami, Yutaka Hirano, Toshihide Hinokuma +1 more·Nov 13, 2025
Distributed architecture is a promising route to scaling fault-tolerant quantum computing (FTQC) beyond the inherent limitations of single processors. For practical implementation of distributed FTQC, logical Bell pair preparation must be designed no...
Ordinary lattice defects as probes of topology
Aiden J. Mains, Jia-Xin Zhong, Yun Jing +1 more·Nov 13, 2025
In addition to topological lattice defects such as dislocations and disclinations, crystals are also accompanied by unavoidable ordinary defects, devoid of any non-trivial geometry or topology, among which vacancies, Schottky defects, substitutions, ...