Role of thermal two-phonon scattering for impurity dynamics in a low-dimensional Bose-Einstein condensate
Lausch T, Widera A, Fleischhauer M (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 97
Article Number: 033620
Journal Issue: 3
DOI: 10.1103/PhysRevA.97.033620
Abstract
We numerically study the relaxation dynamics of a single, heavy impurity atom interacting with a finite one-or two-dimensional, ultracold Bose gas. While there is a clear separation of time scales between processes resulting from single-and two-phonon scattering in three spatial dimensions, the thermalization in lower dimensions is dominated by two-phonon processes. This is due to infrared divergences in the corresponding scattering rates in the thermodynamic limit, which are a manifestation of the Mermin-Wagner-Hohenberg theorem. This makes it necessary to include second-order phonon scattering above a crossover temperature T2ph. T2ph scales inversely with the system size and is much smaller than currently experimentally accessible.
Involved external institutions
Germany (DE)How to cite
APA:
Lausch, T., Widera, A., & Fleischhauer, M. (2018). Role of thermal two-phonon scattering for impurity dynamics in a low-dimensional Bose-Einstein condensate. Physical Review A, 97(3). https://dx.doi.org/10.1103/PhysRevA.97.033620
MLA:
Lausch, Tobias, Artur Widera, and Michael Fleischhauer. "Role of thermal two-phonon scattering for impurity dynamics in a low-dimensional Bose-Einstein condensate." Physical Review A 97.3 (2018).
BibTeX: Download