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Chaotic dynamical ferromagnetic phase induced by nonequilibrium quantum fluctuations
ID Lerose, Alessio (Author), ID Marino, Jamir (Author), ID Žunkovič, Bojan (Author), ID Gambassi, Andrea (Author), ID Silva, Alessandro (Author)

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Abstract
We investigate the robustness of a dynamical phase transition against quantum fluctuations by studying the impact of a ferromagnetic nearest-neighbor spin interaction in one spatial dimension on the nonequilibrium dynamical phase diagram of the fully connected quantum Ising model. In particular, we focus on the transient dynamics after a quantum quench and study the prethermal state via a combination of analytic time-dependent spin wave theory and numerical methods based on matrix product states. We find that, upon increasing the strength of the quantum fluctuations, the dynamical critical point fans out into a chaotic dynamical phase within which the asymptotic ordering is characterized by strong sensitivity to the parameters and initial conditions. We argue that such a phenomenon is general, as it arises from the impact of quantum fluctuations on the mean-field out of equilibrium dynamics of any system which exhibits a broken discrete symmetry.

Language:English
Keywords:quantum mechanics, nonequilibrium statistical mechanics
Typology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Publication status:Published
Publication version:Author Accepted Manuscript
Year:2018
Number of pages:Str. 130603-1-130603-5
Numbering:Vol. 120, iss. 13
PID:20.500.12556/RUL-105233 This link opens in a new window
UDC:536.93
ISSN on article:0031-9007
DOI:10.1103/PhysRevLett.120.130603 This link opens in a new window
COBISS.SI-ID:3192932 This link opens in a new window
Publication date in RUL:13.11.2018
Views:1281
Downloads:620
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Record is a part of a journal

Title:Physical review letters
Shortened title:Phys. rev. lett.
Publisher:American Physical Society
ISSN:0031-9007
COBISS.SI-ID:1282575 This link opens in a new window

Secondary language

Language:Slovenian
Keywords:kvantna mehanika, neravnovesna statistična mehanika

Projects

Funder:EC - European Commission
Funding programme:H2020
Project number:694544
Name:Open many-body non-equilibrium systems
Acronym:OMNES

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