Error-Mitigated Simulation of Quantum Many-Body Scars on Quantum Computers with Pulse-Level Control

dc.contributor.author Chen, I-Chi
dc.contributor.author Burdick, Benjamin
dc.contributor.author Yao, Yongxin
dc.contributor.author Orth, Peter
dc.contributor.author Iadecola, Thomas
dc.contributor.department Physics and Astronomy
dc.contributor.department Ames National Laboratory
dc.date.accessioned 2022-04-25T22:57:44Z
dc.date.available 2022-04-25T22:57:44Z
dc.date.issued 2022
dc.description.abstract Quantum many-body scars are an intriguing dynamical regime in which quantum systems exhibit coherent dynamics and long-range correlations when prepared in certain initial states. We use this combination of coherence and many-body correlations to benchmark the performance of present-day quantum computing devices by using them to simulate the dynamics of an antiferromagnetic initial state in mixed-field Ising chains of up to 19 sites. In addition to calculating the dynamics of local observables, we also calculate the Loschmidt echo and a nontrivial connected correlation function that witnesses long-range many-body correlations in the scarred dynamics. We find coherent dynamics to persist over up to 40 Trotter steps even in the presence of various sources of error. To obtain these results, we leverage a variety of error mitigation techniques including noise tailoring, zero-noise extrapolation, dynamical decoupling, and physically motivated postselection of measurement results. Crucially, we also find that using pulse-level control to implement the Ising interaction yields a substantial improvement over the standard CNOT-based compilation of this interaction. Our results demonstrate the power of error mitigation techniques and pulse-level control to probe many-body coherence and correlation effects on present-day quantum hardware.
dc.description.comments This is a pre-print of the article Chen, I., Benjamin Burdick, Yongxin Yao, Peter P. Orth, and Thomas Iadecola. "Error-Mitigated Simulation of Quantum Many-Body Scars on Quantum Computers with Pulse-Level Control." arXiv preprint arXiv:2203.08291 (2022). DOI: 10.48550/arXiv.2203.08291 Copyright 2022 The Authors. Posted with permission.
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/Dw886L9w
dc.language.iso en
dc.publisher arXiv
dc.source.uri https://doi.org/10.48550/arXiv.2203.08291 *
dc.title Error-Mitigated Simulation of Quantum Many-Body Scars on Quantum Computers with Pulse-Level Control
dc.type Preprint
dspace.entity.type Publication
relation.isAuthorOfPublication a2f70a9e-201d-4351-9b89-24cfb9d6344d
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
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