Papers
Live trends in quantum computing research, updated daily from arXiv.
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12,894 papers in 12 months (-5% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Investigations on Quantum Correlations and Open Quantum System Dynamics Through Nuclear Spins
Arijit Chatterjee·Feb 5, 2026
Nuclear spins provide an ideal platform for studying quantum correlations and open quantum system dynamics across diverse areas, including quantum information, quantum foundations, and many-body physics. This is enabled by their long longitudinal (T1...
Simultaneous reconstruction of quantum process and noise via corrupted sensing
Mengru Ma, Jiangwei Shang·Feb 5, 2026
Quantum processes, including quantum gates and channels, are integral to various quantum information tasks, making the efficient characterization of these processes and their underlying noise critically important. Here, we propose a framework for qua...
Arithmetic Reconciliation for CVQKD: Challenges and Feasibility
Rávilla R. S. Leite, Juliana M. de Assis, Micael A. Dias +1 more·Feb 5, 2026
Continuous variable quantum key distribution allows two legitimate parties to share a common secret key and encompasses reconciliation protocols. A relatively new reconciliation protocol, Arithmetic Reconciliation, presents low complexity and has inc...
Robust Negativity in the Quantum-to-Classical Transition of Kerr Dynamics
Mohsin Raza, John B. DeBrota, Ariel Shlosberg +2 more·Feb 5, 2026
We quantify the quantum-to-classical transition of the single-mode Kerr nonlinear dynamics in the presence of loss. We establish three time scales that govern the dynamics, each with distinct characteristics. For times short compared to the Ehrenfest...
Quantum Fisher Information Revealing Parameter Sensitivity in Long-Baseline Neutrino Experiments
Bhavna Yadav, Amir Subba, Yu Shi·Feb 5, 2026
Determination of the leptonic CP-violating phase $δ_{\mathrm{CP}}$, the atmospheric mixing angle $θ_{23}$, and the mass-squared difference $Δm_{31}^{2}$ constitutes a primary objective of current and next-generation long-baseline neutrino experiments...
Quantum Sequential Circuits
D. -S. Wang·Feb 5, 2026
This work introduces and characterizes quantum sequential circuits (QSCs) as a hardware-oriented paradigm for quantum computing, built upon a novel foundational element termed the quantum transistor. Unlike conventional qubit-based architectures, QSC...
Quantum computational imaging and sensing
Mohan Sarovar·Feb 4, 2026
We present a new framework for imaging and sensing based on utilizing a quantum computer to coherently process quantum information in an electromagnetic field. We describe the framework, its potential to provide improvements in imaging and sensing pe...
Quantum Key Distribution with Imperfections: Recent Advances in Security Proofs
Patrick Andriolo, Esteban Vasquez, Elizabeth Agudelo +3 more·Feb 4, 2026
In contrast to classical cryptography, where the security of encoded messages typically relies on the inability of standard algorithms to overcome computational complexity assumptions, Quantum Key Distribution (QKD) can enable two spatially separated...
Taming multiparty entanglement at measurement-induced phase transitions
Liuke Lyu, James Allen, Yi Hong Teoh +2 more·Feb 4, 2026
Measurement-induced phase transitions (MIPT) give rise to novel dynamical states of quantum matter realized by balancing unitary evolution and measurements. We present large-scale numerical simulations of a trapped-ion native MIPT, argued to belong t...
Tighter Asymptotic Key Rates for Intensity-Correlated Decoy-State QKD via Nonlinear Programming
Matej Pivoluska, Mateus Araújo·Feb 4, 2026
Decoy-state QKD with phase-randomized weak coherent pulses is typically analyzed assuming independent, precisely prepared intensities. Real sources, however, can exhibit correlated intensity drift across rounds, potentially leaking intensity informat...
Constraints on stability and renormalization group flows in nonequilibrium matter
Yu-Hsueh Chen, Tarun Grover·Feb 4, 2026
We derive constraints on renormalization group (RG) flows and stability of phases in nonequilibrium systems using quantum information inequalities. These constraints involve conditional mutual information (CMI), which quantifies correlations between ...
Efficient time-evolution of matrix product states using average Hamiltonians
Belal Abouraya, Jirawat Saiphet, Fedor Jelezko +1 more·Feb 4, 2026
Simulating quantum many-body systems (QMBS) is one of the long-standing, highly non-trivial challenges in condensed matter physics and quantum information due to the exponentially growing size of the system's Hilbert space. To date, tensor networks h...
Information, Dissipation, and Planckian Optimality
Debanjan Chowdhury·Feb 4, 2026
We derive a universal bound on the efficiency with which "dissipated" work can generate distinguishable changes in a quantum many-body state at a finite temperature, as quantified by the quantum Fisher information. The bound follows solely from the a...
Instance-optimal high-precision shadow tomography with few-copy measurements: A metrological approach
Senrui Chen, Weiyuan Gong, Sisi Zhou·Feb 4, 2026
We study the sample complexity of shadow tomography in the high-precision regime under realistic measurement constraints. Given an unknown $d$-dimensional quantum state $ρ$ and a known set of observables $\{O_i\}_{i=1}^m$, the goal is to estimate exp...
Real and momentum space analysis of topological phases in 2D d-wave altermagnets
Manuel Calixto·Feb 4, 2026
Altermagnetism has recently emerged as a third fundamental branch of magnetism, combining the vanishing net magnetization of antiferromagnets with the high-momentum-dependent spin splitting of ferromagnets. This study provides a comprehensive real- a...
Enabling large-scale digital quantum simulations with superconducting qubits
Laurin E. Fischer·Feb 4, 2026
Quantum computing promises to revolutionize several scientific and technological domains through fundamentally new ways of processing information. Among its most compelling applications is digital quantum simulation, where quantum computers are used ...
Quantum Advantage in Decision Trees: A Weighted Graph and $L_1$ Norm Approach
Sebastian Alberto Grillo, Bernardo Daniel Dávalos, Rodney Fabian Franco Torres +2 more·Feb 4, 2026
The analysis of the computational power of single-query quantum algorithms is important because they must extract maximal information from one oracle call, revealing fundamental limits of quantum advantage and enabling optimal, resource-efficient qua...
Agnostic Parameter Estimation with Large Spins
Huining Zhang, X. X. Yi·Feb 4, 2026
The quantum Fisher information of a quantum state with respect to a certain parameter quantifies the sensitivity of the quantum state to changes in that parameter. Maximizing the quantum Fisher information is essential for achieving the optimal estim...
Restoring Landauer's Principle for Unitarily Transformed Thermal Reservoirs
Hao Xu·Feb 4, 2026
Landauer's principle, a cornerstone of quantum information and thermodynamics, appears to be violated when the thermal reservoir is replaced by a squeezed thermal state (STS). We introduce a formal extension of the principle to such unitarily transfo...
Locally Gentle State Certification for High Dimensional Quantum Systems
Cristina Butucea, Jan Johannes, Henning Stein·Feb 4, 2026
Standard approaches to quantum statistical inference rely on measurements that induce a collapse of the wave function, effectively consuming the quantum state to extract information. In this work, we investigate the fundamental limits of \emph{locall...