Relaxation for massive particles: transport and causality
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866909739152048128 |
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| author | Bajec, Matej Soloviev, Alexander |
| author_facet | Bajec, Matej Soloviev, Alexander |
| contents | Correlators at finite density and temperature encode important information about a physical system, such as transport and causality. For a massive gas of particles in the relaxation time approximation of kinetic theory, we provide complete analytic results for all first order transport coefficients, including thermoelectric coefficients. We demonstrate the first complete picture of the complex structure of the correlators as a function of mass, providing an interpretation in terms of the causal structure of lightcones. We provide a simple criterion to extract the effective lightcone velocity from the cut of the retarded correlator. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_15531 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Relaxation for massive particles: transport and causality Bajec, Matej Soloviev, Alexander High Energy Physics - Theory Quantum Gases Nuclear Theory Correlators at finite density and temperature encode important information about a physical system, such as transport and causality. For a massive gas of particles in the relaxation time approximation of kinetic theory, we provide complete analytic results for all first order transport coefficients, including thermoelectric coefficients. We demonstrate the first complete picture of the complex structure of the correlators as a function of mass, providing an interpretation in terms of the causal structure of lightcones. We provide a simple criterion to extract the effective lightcone velocity from the cut of the retarded correlator. |
| title | Relaxation for massive particles: transport and causality |
| topic | High Energy Physics - Theory Quantum Gases Nuclear Theory |
| url | https://arxiv.org/abs/2506.15531 |