Beliaev damping in Bose gas
Mathematical Physics
2024-09-04 v2 Quantum Gases
math.MP
Abstract
According to the Bogoliubov theory the low energy behaviour of the Bose gas at zero temperature can be described by non-interacting bosonic quasiparticles called phonons. In this work the damping rate of phonons at low momenta, the so-called Beliaev damping, is explained and computed with simple arguments involving the Fermi Golden Rule and Bogoliubov's quasiparticles.
Keywords
Cite
@article{arxiv.2310.20070,
title = {Beliaev damping in Bose gas},
author = {Jan Dereziński and Ben Li and Marcin Napiórkowski},
journal= {arXiv preprint arXiv:2310.20070},
year = {2024}
}
Comments
27 pages, 2 figures, revised version