Quenches near criticality of the quantum Ising chain

• Verfasst von: Czischek, Stefanie [VerfasserIn]
• Verfasst von: Gärttner, Martin [VerfasserIn]
• Verfasst von: Oberthaler, Markus K. [VerfasserIn]
• Verfasst von: Gasenzer, Thomas [VerfasserIn]
• Titel: Quenches near criticality of the quantum Ising chain
• Titelzusatz: power and limitations of the discrete truncated Wigner approximation
• Verf.angabe: Stefanie Czischek, Martin Gärttner, Markus Oberthaler, Michael Kastner and Thomas Gasenzer
• Jahr: 2019
• Jahr des Originals: 2018
• Fussnoten: Published 16 October 2018 ; Gesehen am 01.08.2019
• Titel Quelle: Enthalten in: Quantum science and technology
• Ort Quelle: Philadelphia, PA : IOP Publishing, 2016
• Jahr Quelle: 2019
• Band/Heft Quelle: 4(2019,1) Artikel-Nummer 014006, ? Seiten
• ISSN Quelle: 2058-9565
• DOI: doi:10.1088/2058-9565/aae3f7
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1670452166

Abstract

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.