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Article: Continuous-Variable Assisted Thermal Quantum Simulation

TitleContinuous-Variable Assisted Thermal Quantum Simulation
Authors
Issue Date2021
PublisherAmerican Physical Society. The Journal's web site is located at https://journals.aps.org/prl/
Citation
Physical Review Letters, 2021, v. 127 n. 2, p. article no. 020502 How to Cite?
AbstractSimulation of a quantum many-body system at finite temperatures is crucially important but quite challenging. Here we present an experimentally feasible quantum algorithm assisted with continuous variable for simulating quantum systems at finite temperatures. Our algorithm has a time complexity scaling polynomially with the inverse temperature and the desired accuracy. We demonstrate the quantum algorithm by simulating a finite temperature phase diagram of the quantum Ising and Kitaev models. It is found that the important crossover phase diagram of the Kitaev ring can be accurately simulated by a quantum computer with only a few qubits and thus the algorithm may be implementable on current quantum processors. We further propose a protocol with superconducting or trapped ion quantum computers.
Persistent Identifierhttp://hdl.handle.net/10722/302353
ISSN
2020 Impact Factor: 9.161
2020 SCImago Journal Rankings: 3.688
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, DB-
dc.contributor.authorZhang, GQ-
dc.contributor.authorXue, ZY-
dc.contributor.authorZhu, SL-
dc.contributor.authorWang, ZD-
dc.date.accessioned2021-09-06T03:31:04Z-
dc.date.available2021-09-06T03:31:04Z-
dc.date.issued2021-
dc.identifier.citationPhysical Review Letters, 2021, v. 127 n. 2, p. article no. 020502-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/302353-
dc.description.abstractSimulation of a quantum many-body system at finite temperatures is crucially important but quite challenging. Here we present an experimentally feasible quantum algorithm assisted with continuous variable for simulating quantum systems at finite temperatures. Our algorithm has a time complexity scaling polynomially with the inverse temperature and the desired accuracy. We demonstrate the quantum algorithm by simulating a finite temperature phase diagram of the quantum Ising and Kitaev models. It is found that the important crossover phase diagram of the Kitaev ring can be accurately simulated by a quantum computer with only a few qubits and thus the algorithm may be implementable on current quantum processors. We further propose a protocol with superconducting or trapped ion quantum computers.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at https://journals.aps.org/prl/-
dc.relation.ispartofPhysical Review Letters-
dc.rightsCopyright [2021] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevLett.127.020502].-
dc.titleContinuous-Variable Assisted Thermal Quantum Simulation-
dc.typeArticle-
dc.identifier.emailWang, ZD: physhead@hku.hk-
dc.identifier.authorityWang, ZD=rp00802-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevLett.127.020502-
dc.identifier.pmid34296925-
dc.identifier.scopuseid_2-s2.0-85110229729-
dc.identifier.hkuros324736-
dc.identifier.volume127-
dc.identifier.issue2-
dc.identifier.spagearticle no. 020502-
dc.identifier.epagearticle no. 020502-
dc.identifier.isiWOS:000671590400002-
dc.publisher.placeUnited States-

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