Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Unified Probe of Quantum Chaos and Ergodicity from Hamiltonian Learning
Nik O. Gjonbalaj, Christian Kokail, Susanne F. Yelin +1 more·Mar 4, 2026
Developing measures of quantum ergodicity and chaos stands as a foundational task in the study of quantum many-body systems. In this work, we propose metrics for these effects based on Hamiltonian learning that unify multiple advantages of existing m...
HyQBench: A Benchmark Suite for Hybrid CV-DV Quantum Computing
Shubdeep Mohapatra, Yuan Liu, Eddy Z. Zhang +1 more·Mar 4, 2026
Hybrid continuous-variable (CV)-discrete-variable (DV) quantum systems present a promising direction for quantum computing by combining the high dimensional encoding capabilities of qumodes with the control offered by DV qubits on the coupled qumodes...
Coherent Biexciton Transport in the Presence of Exciton-Exciton Annihilation in Molecular Aggregates
Rajesh Dutta, Chern Chuang·Mar 4, 2026
We present a theoretical framework for biexciton dynamics in molecular aggregates that explicitly treats populations and coherences across excitation manifolds within a reduced density-matrix formalism. By extending kinetic descriptions beyond the we...
Benchmarking Quantum Computers via Protocols, Comparing IBM's Heron vs IBM's Eagle
Nitay Mayo, Tal Mor, Yossi Weinstein·Mar 4, 2026
As quantum computing hardware rapidly advances, objectively evaluating the capabilities and error rates of new processors remains a critical challenge for the field. A clear and realistic understanding of current quantum performance is essential to g...
Non-Hermitian Quantum Mechanics with Applications to Gravity
Oem Trivedi, Alfredo Gurrola, Robert J. Scherrer·Mar 4, 2026
Hermiticity is usually treated as a foundational axiom of quantum mechanics, guaranteeing real spectra and unitary time evolution. In this work we argue that Hermiticity is more naturally understood as a symmetry law arising from the global conservat...
Dynamical Behaviour of Density Correlations Across the Chaotic Phase for Interacting Bosons
Óscar Dueñas, Alberto Rodríguez·Mar 4, 2026
We investigate the propagation of two-point density correlations in the one-dimensional Bose-Hubbard Hamiltonian in the thermodynamic limit in terms of the correlation transport distance (CTD), an experimentally measurable magnitude that characterize...
On Error Thresholds for Pauli Channels: Some answers with many more questions
Avantika Agarwal, Alan Bu, Amolak Ratan Kalra +3 more·Mar 4, 2026
This paper focuses on error thresholds for Pauli channels. We numerically compute lower bounds for the thresholds using the analytic framework of coset weight enumerators pioneered by DiVincenzo, Shor and Smolin in 1998. In particular, we study poten...
Quantum error mitigation by hierarchy-informed sampling: chiral dynamics in the Schwinger model
Theo Saporiti, Oleg Kaikov, Vasily Sazonov +1 more·Mar 4, 2026
Quantum simulations on current NISQ hardware are limited by its noisy nature, making efficient quantum error mitigation methods highly demanded. In this paper we introduce a novel mitigation scheme, applicable to arbitrary quantum simulations of time...
Direct derivation of the modified Langevin noise formalism from the canonical quantization of macroscopic electromagnetism
Alessandro Ciattoni·Mar 4, 2026
The modified Langevin noise formalism (MLNF) models the interaction of the quantized electromagnetic field with an arbitrary lossy magneto-dielectric object placed in vacuum using three types of non-interacting bosonic polaritons: scattering, electri...
On the operational and algebraic quantum correlations
Shun Umekawa, Jaeha Lee·Mar 4, 2026
We investigate the intrinsic ambiguity in the definition of correlation functions arising from the inevitable invasiveness of quantum measurements. While algebraic correlations defined as expectation values of products of observables are widely used,...
Magic state distillation with permutation-invariant codes and a two-qubit example
Heather Leitch, Yingkai Ouyang·Mar 4, 2026
Magic states, by allowing non-Clifford gates through gate teleportation, are important building blocks of fault-tolerant quantum computation. Magic state distillation protocols aim to create clean copies of magic states from many noisier copies. Howe...
Long-lived metastable states in the 4f$^{13}$5d6s configuration of Yb$^+$
Z. E. D. Ackerman, A. Cadarso Quevedo, Ilango Maran +4 more·Mar 4, 2026
We study the occurrence of long-lived metastable states in the 4f$^{13}$5d6s electron configuration of Yb$^+$. By optical pumping of a single trapped ion on the $^2F^\text{o}_{7/2}\rightarrow (7/2,0)_{7/2}$ transition at 377.5 nm, we prepare a wide r...
Progress on artificial flat band systems: classifying, perturbing, applying
Carlo Danieli, Sergej Flach·Mar 4, 2026
We highlight recent progress in the study of artificial flat band systems with a threefold focus. First, we discuss single-particle flat band physics, which has advanced through the design of various flat band generators. These generators rely on the...
Modeling Energy Relaxation via Quantum Thermalization: A Superconducting Qubit Coupled to a Many-Body TLS System
Xue-Yi Guo·Mar 4, 2026
While two-level systems (TLS) in superconducting qubits are known to introduce phonon-mediated energy dissipation channels, many-body TLS systems themselves can also act as a distinct dissipation channel whose effect on qubit energy relaxation remain...
Minimum Weight Decoding in the Colour Code is NP-hard
Mark Walters, Mark L. Turner·Mar 4, 2026
All utility-scale quantum computers will require some form of Quantum Error Correction in which logical qubits are encoded in a larger number of physical qubits. One promising encoding is known as the colour code which has broad applicability across ...
Constructing Arbitrary Coherent Rearrangements in Optical Lattices
Alexander Roth, Liyang Qiu, Timon Hilker +2 more·Mar 4, 2026
Coherent control of motional degrees of freedom of ultracold atoms in optical lattices offers a promising route towards programmable quantum dynamics with massive particles. We propose and analyze a scheme for implementing coherent rearrangement of u...
OptiQKD: A Machine Learning-Optimized Framework for Real-Time Parameter Tuning in Quantum Key Distribution
Noureldin Mohamed, Jawaher Kaldari, Saif Al-Kuwari·Mar 4, 2026
Despite the robust security guarantees of Quantum Key Distribution (QKD), its practical deployment is significantly challenged by the dynamic nature of quantum channels and the complexity of real-time parameter optimization. In this paper, we propose...
Distributed optimization of Lindblad equations for large-scale cavity QED systems
Hui-hui Miao·Mar 4, 2026
This paper proposes a distributed computing framework for solving the Lindblad master equation in large-dimensional cavity QED systems. By leveraging the sparsity of the jump operator and combining this approach with the Cannon algorithm, the computa...
Achieving Optimal-Distance Atom-Loss Correction via Pauli Envelope
Pengyu Liu, Shi Jie Samuel Tan, Eric Huang +3 more·Mar 4, 2026
Atom loss is a major error source in neutral-atom quantum computers, accounting for over 40% of the total physical errors in recent experiments. Its nonlinear and correlated nature poses significant challenges: current syndrome extraction circuits re...
Non-local nonstabiliserness in Gluon and Graviton Scattering
John Gargalionis, Nathan Moynihan, Michael L. Reichenberg Ashby +3 more·Mar 4, 2026
The property of non-stabiliserness, or ``magic'', is of interest in quantum computing due to its role in developing fault-tolerant quantum algorithms with genuine computational advantage over classical counterparts. There has been much interest in qu...