Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Projection Operator Stochastic Equations for Non-Markovian Quantum Systems Under Continuous Measurement-Based Feedback
H. I. Nurdin·Jun 30, 2026
Quantum Markov models have been successfully used to accurately model various physical quantum systems in fields such as quantum optics, optomechanics and superconducting circuits and they provide the basis for (measurement-based) quantum feedback co...
Full-Wave Green's-Function Modeling of Collective Single-Photon Emission in Non-Markovian Open-System QED with Finite-Bandwidth Compensation of Dispersive Interactions
Hyunwoo Choi, Jisang Seo, Junwoo Gim +3 more·Jun 30, 2026
This work presents a full-wave Green's function framework for modeling collective and coherent single-photon emission from multiple quantum emitters embedded in complex electromagnetic structures. Starting from a transverse modal completeness relatio...
Ferroelectric transmon
M. Donaire, A. Cano·Jun 30, 2026
Superconducting qubits are a leading platform for quantum computing. However, simultaneously achieving low noise sensitivity to suppress decoherence and sufficient anharmonicity to enable fast gate operations remains a central challenge. Here, we int...
Non-Hermitian Rayleigh-Schrödinger-like Perturbation Theory at Exceptional Point
Wei-Ming Chen, Chia-Yi Ju·Jun 30, 2026
We develop a Rayleigh--Schrödinger-like perturbation theory for non-Hermitian quantum systems at an exceptional point of order $N$. Working in the Jordan basis of the unperturbed Hamiltonian and employing a Puiseux expansion of the perturbed eigenval...
Absorption capacity of separable noise: Bell-mixing thresholds on entanglement and teleportation
Xuan Du Trinh·Jun 30, 2026
We study Bell-mixing lines $ρ_λ=λΦ^+ +(1-λ)σ$, where $Φ^+$ is a fixed Bell reference and $σ$ is a separable two-qubit noise state. Along this line there are two operational crossings: the state becomes entangled, and it reaches quantum teleportation ...
Mapping photon-number regimes in single-emitter lasers
Alexandra Gospodinov, Celia Powers, Imran M. Mirza·Jun 30, 2026
Cavity quantum electrodynamics (cQED) architectures are known to produce traditional laser signatures from a coherently driven single quantum emitter. In this paper, we present a numerical analysis of an open quantum system consisting of an incoheren...
Unresolved-Sideband Optomechanics with Hexagonal Boron Nitride: Induced Transparency, Gain, and Frequency Combs
Francesco Fogliano, Thibaud Ruelle, David Jaeger +1 more·Jun 30, 2026
Optomechanically induced transparency (OMIT) is usually modeled and studied in the resolved-sideband regime, but many compact microcavity platforms operate in the unresolved-sideband limit $(κ\gg Ω_m)$. Here we investigate OMIT in this regime using a...
Cumulant-based quantum relative Rényi functional
Atirat Meunson, Tanapat Deesuwan·Jun 30, 2026
We introduce a new cumulant-based quantum relative Rényi functional as a candidate quantum Rényi divergence, derived from the cumulant-generating function (CGF) of the quantum relative surprisal operator and extending the classical connection between...
Pauli Weight Hamiltonian Term Selection for Optimized Machine Learning Based Quantum Error Mitigation
Fadhil Fatih Shiddiq, Darell Timothy Tarigan, Hadyan Luthfan Prihadi +4 more·Jun 30, 2026
Machine learning provides a scalable solution for quantum error mitigation. However, the selection of appropriate Pauli strings for inclusion in training data remains a challenge. Current methods rely on heuristic or uniform random sampling, requirin...
Atom diffraction in the strong-coupling regime
Carina Kanitz, Jakob Bühler, François Aguillon +6 more·Jun 30, 2026
Analytic methods based on matter-wave diffraction are a cornerstone in condensed-matter research, providing access to static and dynamic materials properties down to the atomic level. In these experiments, the shape of the diffraction pattern is larg...
Cross-Domain Feature Expansion for Tabular Medical Data via Knowledge Graphs Injection
Mengying Zhou, Yongjie Yin, Haoyan Xin +2 more·Jun 30, 2026
Acquiring comprehensive cross-domain biomedical profiles is often costly and time-consuming, resulting in severe data scarcity in medical research. To address this challenge, we propose MedKGTab, a knowledge-injected framework specifically engineered...
Entanglement Structure Across $\mathbb{Z}_n$ Phase Transitions in 1D Rydberg Atom Arrays
Hyeonjun Yeo, Kabgyun Jeong, Hyunchul Nha·Jun 30, 2026
Multipartite quantum entanglement plays a crucial role in the emergence of different quantum phases and their transitions in quantum many-body systems. It is of general interest to know what sort of analysis on quantum entanglement can bring us a pro...
Topological phase transition in chaotic optomechanical systems
Xiao-Jun Zhang·Jun 30, 2026
Hidden structures with well-defined predictability are uncovered in the evolution of a chaotic optomechanical system from the perspective of the $ε$-machine. Tuning the frequency of the driving laser can switch off this predictability, and such behav...
Energetics of non-Gaussianity in single mode cavities
Sahil Sardar Jafar, Kian Hwee Lim, Kiarn T. Laverick +3 more·Jun 30, 2026
Non-Gaussian states play a central role in quantum technologies, making the ability to quantify non-Gaussianity essential. We introduce an energetic framework to characterize non-Gaussianity in single-mode bosonic states by decomposing the total ener...
Radical-Fragment Many-Body Expansion for Linear Alkane Quantum Chemistry
Daniel Sierra-Sosa, Jorge Saavedra, Santiago Solares +1 more·Jun 30, 2026
We introduce a radical-fragment many-body expansion at the two-body level (MBE2) for quantum chemistry of linear alkanes. Instead of heterolytic bond cleavage with hydrogen capping atoms and electrostatic embedding like in Fragment Molecular Orbital ...
Floquet Quasienergy-Resolved Dissipation, Dynamics, and Spectroscopy in Ultrastrong Cavity-QED
Kamran Akbari, Franco Nori, Stephen Hughes·Jun 30, 2026
Strong periodic driving of cavity-quantum electrodynamics (QED) in the ultrastrong-coupling regime creates nonequilibrium states whose dissipation is governed by Floquet quasienergies rather than undriven dressed resonances. However, modeling such a ...
Nonclassicality of a delayed remote-controlled quantum computing model
Peicun Lin, Dongyang Wang, Yong Liu +1 more·Jun 30, 2026
Delegated quantum computing is likely to become the primary means for most people to access quantum computers in the future. However, these hardware inevitably operate beyond clients' control, raising concerns about potentially untrusted servers. A f...
Generalised Probabilistic Theories
Zujin Wen, Zihan Wang, Xiangjing Liu +1 more·Jun 30, 2026
We give an introduction to research associated with the generalised probabilistic theories framework, also known as the convex framework. States are real vectors representing lists of probabilities of measurement outcomes. Convex combinations of the ...
Quantum Derivative Pricing for SPDEs via BDSDE Representation
Xinmiao Li, Yanqiao Wang, Rundi Lu +2 more·Jun 30, 2026
We study quantum speedups of derivative pricing for stochastic partial differential equation (SPDE) models through their backward doubly stochastic differential equation (BDSDE) representations. We develop conditional and nested quantum-accelerated m...
Position: The Inevitable Transition to Machine Learning in Quantum Chemistry
Karen Sargsyan, Chao-Ping Hsu·Jun 30, 2026
Finding exact solutions to the quantum many-body problem is computationally intractable (QMA-hard). Traditional approximations for electrons in an atom or molecule -- density functional theory and wavefunction methods -- have been indispensable, but ...