Alessio Lerose (Author), Jamir Marino (Author), Bojan Žunkovič (Author), Andrea Gambassi (Author), Alessandro Silva (Author)

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.

Keywords

kvantna mehanika;neravnovesna statistična mehanika;quantum mechanics;nonequilibrium statistical mechanics;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 536.93
COBISS: 3192932 Link will open in a new window
ISSN: 0031-9007
Views: 805
Downloads: 480
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Other data

Secondary language: Slovenian
Secondary keywords: kvantna mehanika;neravnovesna statistična mehanika;
Pages: str. 130603-1-130603-5
Volume: ǂVol. ǂ120
Issue: ǂiss. ǂ13
Chronology: 2018
DOI: 10.1103/PhysRevLett.120.130603
ID: 10983604