Papers
Live trends in quantum computing research, updated daily from arXiv.
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Emergent energy scales in magnonic systems with relative motion
Daigo Oue·Jun 28, 2026
Relative motion between interacting systems can generate emergent energy scales that are absent in isolated systems. While uniform motion can be eliminated by a Galilean transformation, relative motion between interacting systems generally cannot. In...
Intrinsic Indistinguishability of Identical Particles and How Particle Labels Affect It
Valery Shchesnovich·Jun 28, 2026
We investigate indistinguishability of identical bosons and fermions undergoing arbitrary particle-number-preserving evolutions of their visible degrees of freedom. For the projective indistinguishability measure, defined by the projection of the vis...
Pseudo entropy and topological phases of matter
Pramod Kamal Kharel, Manghang Limbu, Nabaraj Khatri +2 more·Jun 28, 2026
Entanglement entropy has proven to be a powerful probe of phenomena such as quantum chaos and phase transitions. Pseudo entropy is a recently proposed time-like generalization of an entanglement measure, motivated by de Sitter holography. In this wor...
Volume Law and Universality of Entanglement Entropy in Random Graph Fermi Systems
Saikat Sur·Jun 28, 2026
We study the ground-state entanglement entropy of free fermions on random graphs. We first establish a general criterion for the volume law on random graphs, based on the spectral characteristics of the Hamiltonian. We then apply this criterion to th...
Private training in quantum machine learning
Tigran Sedrakyan, Frédéric Grosshans, Elham Kashefi·Jun 28, 2026
With the emergence of machine learning (ML) models trained on large datasets containing potentially sensitive data, a major question in AI safety is how to make learning private with respect to the training data. Similar to classical machine learning...
Learning Inhomogeneous Heisenberg Hamiltonians in Nanographene Spin Chains
Greta Lupi, Saketh Ravuri, Chenxiao Zhao +9 more·Jun 28, 2026
Inferring microscopic Hamiltonians from experimental data is a central challenge in quantum materials and quantum simulation. In low-dimensional spin systems, exchange interactions are often assumed to be spatially uniform, despite structural and env...
Quantum algorithm for the nonlinear Schrödinger equation via the Lax-pair scattering
Chenjia Zhu, Zhaoyuan Meng, Yousheng Zhang +1 more·Jun 28, 2026
The nonlinear Schrödinger equation (NLSE) governs a broad class of wave phenomena, including deep-water waves, quantum turbulence, and solitons. The multiscale spatiotemporal coupling inherent in these systems imposes severe computational bottlenecks...
QmDFT for Polycyclic Aromatics: Balancing Embedding Ground-State Fidelity and Experimental Gap Estimation
N. Manglani, Tejjan Arora, Samrit Maity +3 more·Jun 28, 2026
Quantum Embedding density functional theory (QmDFT) embedding offers a highly scalable approach to improve treatment for large highly correlated pi conjugated systems. However, estimating advanced electronic structure properties in polycyclic aromati...
Imaginary pseudo entropy encodes temporal orientation
Tatsuhiro Misumi·Jun 28, 2026
Pseudo entropy between quantum states at different times is generally complex, yet its imaginary part has lacked a bounded operational meaning. We show that a calibrated replica interferometer converts the pseudo-Rényi phase into a directly measurabl...
Rodeo Filtering for Direct Steady-State Estimation in Open Quantum Systems
Hyeonjun Yeo, Jongin Jeong, Soyoung Shin +1 more·Jun 28, 2026
Computing non-equilibrium steady states of open quantum systems is a challenging task on conventional computers, motivating quantum algorithms for direct steady-state estimation. A natural route is to regard the steady state as the zero mode of the L...
Embedded Random Matrix Ensembles to Statistical Shell Model: Operation of $q$-normal forms
V. K. B. Kota, N. D. Chavda, Manan Vyas·Jun 28, 2026
Embedded random matrix ensembles operating in nuclear shell model spaces, with nucleons occupying a finite set of single particle orbits and interacting via a two-body interaction, form the basis for statistical shell model. With sufficiently strong ...
Gaussian quantum steering of coupled three-mode squeezed vacuum in an expanding universe
Guang-Wei Mi, Xiaofen Huang, Tinggui Zhang·Jun 28, 2026
The coupled three-mode squeezed vacuum is a representative multimode squeezed Gaussian state featuring unique steerability. This work investigates Gaussian quantum steering distributions of the coupled three-mode squeezed vacuum under an expanding un...
Quantum scrambling of algebras of observables: the $\mathbb{Z}_2$-symmetric case
Paolo Zanardi, J. Karson Lewis·Jun 28, 2026
We consider unitary quantum scrambling for an entire class of observable algebras $\mathcal A$ whose commutant ${\mathcal A}'=\mathbb{C}\mathbb{Z}_2$ is generated by a Hermitian involution $S$, i.e., a parity operator. We adopt two different, althoug...
Shadow tomography for classical tensor network simulations
Jiace Sun, Garnet Kin-Lic Chan·Jun 28, 2026
Shadow tomography has appeared as a powerful tool for estimating observables on quantum computers from a small number of samples. We show that shadow-tomography-inspired ideas can offer similarly improved sample scaling for estimating observables on ...
Localized Covariant Quantities Appear To Underlie Quantum Circuits
Ken Wharton, Roderick Sutherland, Titus Amza +1 more·Jun 27, 2026
Although entangled state vectors cannot be fully described in terms of variables localized in space and time, any given entanglement experiment can be built from basic quantum circuit components with well-defined locations. We analyze such quantum ci...
Exact Hilbert-space ergodicity from continuous monitoring
Yue Wu, Yuzhi Tong, Liang Mao +1 more·Jun 27, 2026
Quantum evolution is generally expected to drive a quantum many-body system toward equilibrium. This expectation is often justified by the Hilbert-space ergodicity of generic quantum dynamics, namely, the idea that pure-state evolution explores Hilbe...
Quantifying Quantum Correlations in Annihilation Photon Pairs under Compton Scattering
Z. AskariPour Ravari, Z. Riazi·Jun 27, 2026
We present a theoretical study of the evolution of polarization entanglement and quantum coherence in 511 keV photon pairs produced by para-positronium decay during successive Compton scattering events. We start with a maximally entangled Bell state ...
Memory as an Attack Surface in LLM Agents: A Study on Multiple-Choice Question Answering
Shahnewaz Karim Sakib, Anindya Bijoy Das·Jun 27, 2026
AI agents extend conventional large language model (LLM) applications by integrating language understanding with task execution, external tool use, and memory mechanisms. While memory allows agents to retain prior interactions and provide more person...
Preventing Error Propagation in Multi-Agent AI through Runtime Monitoring
Shahnewaz Karim Sakib, Anindya Bijoy Das·Jun 27, 2026
Multi-agent AI systems can improve answer selection by allowing different language models to exchange reasoning traces, revise initial predictions, and support a final decision. However, such communication may also introduce reliability risks: reason...
Semantic-Aware, Physics-Informed, Geometry-Grounded Weather Video Synthesis
Chenghao Qian, Nedko Savov, Lingdong Kong +7 more·Jun 27, 2026
Weather synthesis aims to add weather effects to input videos while preserving scene identity, structure, and motion. The key limitation of existing methods is the lack of diversity in weather appearance and effective control over weather dynamics (e...