期刊
QUANTUM SCIENCE AND TECHNOLOGY
卷 4, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2058-9565/aae3f7
关键词
quantum simulation; discrete truncated Wigner approximation; transverse field Ising model; quantum critical regime; semi-classical approximation
资金
- Horizon-2020 framework programme of the European Union (FET-Proactive, AQuS) [640800]
- Horizon-2020 framework programme of the European Union (ERC Advanced Grant EntangleGen) [694561]
- Deutsche Forschungsgemeinschaft [SFB 1225 ISOQUANT]
- Heidelberg University (CQD, STRUCTURES)
- National Research Foundation of South Africa through the Competitive Programme for Rated Researches
- Erwin Schrodinger International Institute for Mathematics and Physics
The semi-classical discrete truncated Wigner approximation has recently been proposed as a simulation method for spin-1/2 systems. While it appears to provide a powerful approach which shows promising results in higher dimensions and for systems with long-range interactions, its performance is still not well understood in general. Here we perform a systematic benchmarking on the one-dimensional transverse-field Ising model and point to limitations of the approximation arising after sudden quenches into the quantum critical regime. Our procedure allows to identify the limitations of the semi-classical simulations and with that to determine the regimes and questions where quantum simulators can provide information which is inaccessible to semi-classics.
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