KIP-Veröffentlichungen

 
Jahr 2018
Autor(en) Stefanie Czischek, Martin Gärttner, Markus Oberthaler, Michael Kastner and Thomas Gasenzer
Titel Quenches near criticality of the quantum Ising chain-power and limitations of the discrete truncated Wigner approximation
KIP-Nummer HD-KIP 18-76
KIP-Gruppe(n) F20,F27,F30
Dokumentart Paper
Quelle Quantum Sci. Technol. 4 (2018) 014006, arXiv:1805.05221
doi http://dx.doi.org/10.1088/2058-9565/aae3f7
Abstract (en)

The semi-classical discrete truncated Wigner approximation (dTWA) 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 benchmark 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.

bibtex
@article{Czischek2018aQuSciTech4014006,
  author   = {Czischek, Stefanie and G\"arttner, Martin and Oberthaler, Markus and Kastner, Michael and Gasenzer, Thomas},
  title    = {Quenches near criticality of the quantum Ising chain-power and limitations of the discrete truncated Wigner approximation},
  journal  = {Quantum Sci. Technol.,  Volume: 4,  Issue: 1,  arXiv:1805.05221},
  year     = {2018},
  volume   = {},
  pages    = {014006},
  doi      = {10.1088/2058-9565/aae3f7},
  url      = {http://xxx.arxiv.org/abs/1805.05221}
}
URL arXiv:1805.05221 [quant-ph]
URL doi:10.1088/2058-9565/aae3f7
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