Publication
Title
Prethermalization to thermalization crossover in a dilute Bose gas following an interaction ramp
Author
Abstract
The dynamics of a weakly interacting Bose gas at low temperatures is close to integrable due to the approximate quadratic nature of the many-body Hamiltonian. While the short-time physics after an abrupt ramp of the interaction constant is dominated by integrable dynamics, integrability is broken at longer times by higher-order interaction terms in the Bogoliubov Hamiltonian, in particular, by Beliaev-Landau scatterings involving three quasiparticles. The two-stage relaxation process is highlighted in the evolution of local observables such as the density-density correlation function: an integrable dephasing mechanism leads the system to a prethermal stage, followed by true thermalization conveyed by quasiparticle collisions. Our results bring the crossover from prethermalization to thermalization within reach of current experiments with ultracold atomic gases.
Language
English
Source (journal)
PHYSICAL REVIEW A
Publication
2018
Volume/pages
98:5(2018), 7 p.
Article Reference
053612
ISI
000449514500003
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
PEGASUS-2: [PEGASUS]², giving wings to your career
AQUS: Analog quantum simulators for many-body dynamics
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 10.12.2018
Last edited 15.07.2021
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