1. Beliaev damping in Bose gas
- Author
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Dereziński, Jan, Li, Ben, and Napiórkowski, Marcin
- Subjects
Mathematical Physics ,Condensed Matter - Quantum Gases - 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., Comment: 27 pages, 2 figures, revised version
- Published
- 2023
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