Beliaev Damping in Bose Gas

IF 1.3 3区 物理与天体物理 Q3 PHYSICS, MATHEMATICAL Journal of Statistical Physics Pub Date : 2024-08-30 DOI:10.1007/s10955-024-03328-2
Jan Dereziński, Ben Li, Marcin Napiórkowski
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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.

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玻色气体中的别利亚耶夫阻尼
根据波哥留波夫理论,玻色气体在零温下的低能行为可以用称为声子的非相互作用玻色子准粒子来描述。在这项研究中,通过涉及费米黄金定律和波哥留波夫准粒子的简单论证,解释并计算了声子在低时刻的阻尼率,即所谓的贝利亚耶夫阻尼。
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来源期刊
Journal of Statistical Physics
Journal of Statistical Physics 物理-物理:数学物理
CiteScore
3.10
自引率
12.50%
发文量
152
审稿时长
3-6 weeks
期刊介绍: The Journal of Statistical Physics publishes original and invited review papers in all areas of statistical physics as well as in related fields concerned with collective phenomena in physical systems.
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