Chaotic Dynamical Ferromagnetic Phase Induced by Nonequilibrium Quantum Fluctuations
| Autor: | Jamir Marino, Alessandro Silva, Alessio Lerose, Andrea Gambassi, Bojan Žunkovič |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Quantum phase transition
Physics Phase transition Statistical Mechanics (cond-mat.stat-mech) General Physics and Astronomy FOS: Physical sciences 01 natural sciences 010305 fluids & plasmas Statistical Mechanics Settore FIS/02 - Fisica Teorica Modelli e Metodi Matematici Settore FIS/03 - Fisica della Materia Critical point (thermodynamics) Spin wave 0103 physical sciences Ising model Statistical physics 010306 general physics Quantum Quantum fluctuation Condensed Matter - Statistical Mechanics Discrete symmetry |
| Zdroj: | Physical Review Letters |
| ISSN: | 1079-7114 |
| Popis: | We investigate the robustness of a dynamical phase transition against quantum fluctuations by studying the impact of a ferromagnetic nearest-neighbour spin interaction in one spatial dimension on the non-equilibrium 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 pre-thermal 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 characterised 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. 5+8 pages, 3+2 figures; revised version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|