Papers
Live trends in quantum computing research, updated daily from arXiv.
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Twisted superconducting quantum diodes: Towards anharmonicity and high fidelity
Han Zhong, Denis Kochan, Igor Zutic +1 more·Oct 22, 2025
As quantum technologies advance, a fundamental challenge is mitigating noise and backscattering in superconducting circuits to achieve scalable, high-fidelity operations. Conventional superconducting components lack directionality, causing energy los...
Quantum computation of molecular geometry via many-body nuclear spin echoes
C. Zhang, R. G. Cortiñas, A. H. Karamlou +320 more·Oct 22, 2025
Quantum-information-inspired experiments in nuclear magnetic resonance spectroscopy may yield a pathway towards determining molecular structure and properties that are otherwise challenging to learn. We measure out-of-time-ordered correlators (OTOCs)...
Low overhead circuit cutting with operator backpropagation
Debarthi Pal, Ritajit Majumdar·Oct 22, 2025
Current quantum computers suffer from noise due to lack of error correction. Several techniques to mitigate the effect of noise have been studied, in particular to extract the expectation value of observables. One such technique, circuit cutting, par...
Absence of measurement- and unraveling-induced entanglement transitions in continuously monitored one-dimensional free fermions
Clemens Niederegger, Tatiana Vovk, Elias Starchl +1 more·Oct 22, 2025
Continuous monitoring of one-dimensional free fermionic systems can generate phenomena reminiscent of quantum criticality, such as logarithmic entanglement growth, algebraic correlations, and emergent conformal invariance, but in a nonequilibrium set...
Hybrid Quantum-Classical Eigensolver with Real-Space Sampling and Symmetric Subspace Measurements
Lei Xu, Ling Wang·Oct 22, 2025
We propose a hybrid quantum-classical eigensolver to address the computational challenges of simulating strongly correlated quantum many-body systems, where the exponential growth of the Hilbert space and extensive entanglement render classical metho...
Variational Quantum Algorithm for Unitary Dilation
S. X. Li, Keren Li, J. B. You +4 more·Oct 22, 2025
We introduce a hybrid quantum-classical framework for efficiently implementing approximate unitary dilations of non-unitary operators with enhanced noise resilience. The method embeds a target non-unitary operator into a subblock of a unitary matrix ...
Dynamics of Majorana Fermions on a Quantum Computer
Yuxiao Hang, Rosa Di Felice, A. Nakano +1 more·Oct 22, 2025
The study of quasiparticle dynamics is central to understanding non-equilibrium phenomena in quantum many-body systems. Direct simulation of such dynamics on quantum hardware has been limited by circuit depth and noise constraints. In this work, we u...
Active tuning of ENZ resonances in meta-antenna through phase modulation of optical pulse
Elif Ozturk, Hira Asif, Mehmet Gunay +2 more·Oct 21, 2025
Plasmonic nanoantennas offer new avenues to manipulate the propagation of light in materials due to their near field enhancement and ultrafast response time. Here we investigate the epsilon-near-zero (ENZ) response in an L-shaped nanoantenna structur...
Simulating high-accuracy nuclear motion Hamiltonians using discrete variable representation and Walsh-Hadamard QROM on fault-tolerant quantum computers
Michał Szczepanik, Ákos Nagy, Emil Żak·Oct 21, 2025
We present a quantum algorithm for simulating rovibrational Hamiltonians on fault-tolerant quantum computers. The method integrates exact curvilinear kinetic energy operators and general-form potential energy surfaces expressed in a hybrid finite-bas...
High-Fidelity Scalable Quantum State Preparation via the Fusion Method
Matthew Patkowski, Onat Ayyildiz, Matjaž Kebrič +2 more·Oct 21, 2025
Robust and efficient eigenstate preparation is a central challenge in quantum simulation. The Rodeo Algorithm (RA) offers exponential convergence to a target eigenstate but suffers from poor performance when the initial state has low overlap with the...
Two Quantum Algorithms for Nonlinear Reaction-Diffusion Equation using Chebyshev Approximation Method
Manish Kumar·Oct 21, 2025
We present two new quantum algorithms for reaction-diffusion equations that employ the truncated Chebyshev polynomial approximation. This method is employed to numerically solve the ordinary differential equation emerging from the linearization of th...
Noise-Assisted Feedback Control of Open Quantum Systems for Ground State Properties
Kasturi Ranjan Swain, Rajesh K. Malla, Adolfo del Campo·Oct 21, 2025
Intrinsic noise in pre-fault-tolerant quantum devices poses a major challenge to the reliable realization of unitary dynamics in quantum algorithms and simulations. To address this, we present a method for simulating open quantum system dynamics on a...
Symmetry-accelerated classical simulation of Clifford-dominated circuits
Giulio Camillo, Filipa C. R. Peres, Markus Heinrich +1 more·Oct 21, 2025
Classical simulation of quantum circuits plays a crucial role in validating quantum hardware and delineating the boundaries of quantum advantage. Among the most effective simulation techniques are those based on the stabilizer extent, which quantifie...
On the stabilizer complexity of Hawking radiation
Ritam Basu, Onkar Parrikar, Suprakash Paul +1 more·Oct 21, 2025
We study the complexity of Hawking radiation for an evaporating black hole from the perspective of the stabilizer theory of quantum computation. Specifically, we calculate Wigner negativity -- a magic monotone which can be interpreted as a measure of...
Repulsively Bound Hadrons in a $\mathbb{Z}_2$ Lattice Gauge Theory
Sayak Guha Roy, Vaibhav Sharma, Kaidi Xu +3 more·Oct 21, 2025
The $\mathbb{Z}_2$ lattice gauge theory is a paradigmatic model that exhibits gauge-field-mediated-confinement of pairs of particles into mesons, drawing connections to quantum chromodynamics. In the absence of any additional attractive interactions ...
Lyapunov-Aware Quantum-Inspired Reinforcement Learning for Continuous-Time Vehicle Control: A Feasibility Study
Nutkritta Kraipatthanapong, Natthaphat Thathong, Pannita Suksawas +4 more·Oct 21, 2025
This paper presents a novel Lyapunov-Based Quantum Reinforcement Learning (LQRL) framework that integrates quantum policy optimization with Lyapunov stability analysis for continuous-time vehicle control. The proposed approach combines the representa...
Simple logical quantum computation with concatenated symplectic double codes
Noah Berthusen, Elijah Durso-Sabina·Oct 21, 2025
There have been significant recent advances in constructing theoretical and practical quantum error correcting codes that function well as quantum memories; however, performing fault-tolerant logical gates on these codes is less studied, and the prot...
Source-device-independent monolithically integrated QRNG in a black box with generation rate in excess of 30 Gbit/s
Peter Seigo Kincaid, Lorenzo De Marinis, Francesco Testa +2 more·Oct 21, 2025
Quantum mechanics provides a secure means of generating random numbers, with applications in fields spanning scientific simulation to cryptography. The first source-device-independent monolithically integrated quantum random number generator is repor...
Renormalized dual basis for scalable simulations of 2+1D compact quantum electrodynamics
Marc Miranda-Riaza, Pierpaolo Fontana, Alessio Celi·Oct 21, 2025
The classical and quantum simulation of lattice gauge theories (LGTs) with Lie groups is hindered by the infinite-dimensional Hilbert space of gauge degrees of freedom. In a recent work [Phys. Rev. X 15, 031065 (2025)], we introduced a new truncation...
Grid-Partitioned MWIS Solving with Neutral Atom Quantum Computing for QUBO Problems
Soumyadip Das, Suman Kumar Roy, Rahul Rana +1 more·Oct 21, 2025
Quadratic Unconstrained Binary Optimization (QUBO) problems are prevalent in real-world applications, such as portfolio optimization, but pose significant computational challenges for large-scale instances. We propose a hybrid quantum-classical frame...