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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.07701 |
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| _version_ | 1866911469328662528 |
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| author | Dereziński, Jan Pettinari, Lorenzo |
| author_facet | Dereziński, Jan Pettinari, Lorenzo |
| contents | We consider homogeneous Bose gas in a large cubic box with periodic boundary conditions interacting with a small potential with a positive Fourier transform. We compute the imaginary part of the phononic excitation spectrum in the lowest order of perturbation theory in thermodynamic limit at low temperatures and low momentum. Our analysis is based on perturbation theory of the standard Liouvillean. We use two approaches: the first, motivated by the standard representation of operator algebras, examines resonances near zero; the second analyzes the 2-point correlation function in the energy-momentum space. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_07701 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Damping of phonons in Bose gas at low temperatures Dereziński, Jan Pettinari, Lorenzo Mathematical Physics We consider homogeneous Bose gas in a large cubic box with periodic boundary conditions interacting with a small potential with a positive Fourier transform. We compute the imaginary part of the phononic excitation spectrum in the lowest order of perturbation theory in thermodynamic limit at low temperatures and low momentum. Our analysis is based on perturbation theory of the standard Liouvillean. We use two approaches: the first, motivated by the standard representation of operator algebras, examines resonances near zero; the second analyzes the 2-point correlation function in the energy-momentum space. |
| title | Damping of phonons in Bose gas at low temperatures |
| topic | Mathematical Physics |
| url | https://arxiv.org/abs/2602.07701 |