Beliaev damping in Bose gas
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866913489437589504 |
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| author | Dereziński, Jan Li, Ben Napiórkowski, Marcin |
| author_facet | Dereziński, Jan Li, Ben Napiórkowski, Marcin |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_20070 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Beliaev damping in Bose gas Dereziński, Jan Li, Ben Napiórkowski, Marcin Mathematical Physics Quantum Gases 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. |
| title | Beliaev damping in Bose gas |
| topic | Mathematical Physics Quantum Gases |
| url | https://arxiv.org/abs/2310.20070 |