Observation of the Fermionic Joule-Thomson Effect
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866911841196703744 |
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| author | Ji, Yunpeng Chen, Jianyi Schumacher, Grant L. Assumpção, Gabriel G. T. Huang, Songtao Vivanco, Franklin J. Navon, Nir |
| author_facet | Ji, Yunpeng Chen, Jianyi Schumacher, Grant L. Assumpção, Gabriel G. T. Huang, Songtao Vivanco, Franklin J. Navon, Nir |
| contents | We report the observation of the quantum Joule-Thomson (JT) effect in ideal and unitary Fermi gases. We study the temperature dynamics of these systems while they undergo an energy-per-particle conserving rarefaction. For scale-invariant systems, whose equations of state satisfy the relation $U\propto PV$, this rarefaction conserves the specific enthalpy, which makes it thermodynamically equivalent to a JT throttling process. We observe JT heating in an ideal Fermi gas, stronger at higher quantum degeneracy, a result of the repulsive quantum-statistical `force' arising from Pauli blocking. In a unitary Fermi gas, we observe that the JT heating is marginal in the temperature range $0.2 \lesssim T/T_{\mathrm{F}} \lesssim 0.8 $ as the repulsive quantum-statistical effect is lessened by the attractive interparticle interaction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_16320 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observation of the Fermionic Joule-Thomson Effect Ji, Yunpeng Chen, Jianyi Schumacher, Grant L. Assumpção, Gabriel G. T. Huang, Songtao Vivanco, Franklin J. Navon, Nir Quantum Gases Statistical Mechanics Atomic Physics Quantum Physics We report the observation of the quantum Joule-Thomson (JT) effect in ideal and unitary Fermi gases. We study the temperature dynamics of these systems while they undergo an energy-per-particle conserving rarefaction. For scale-invariant systems, whose equations of state satisfy the relation $U\propto PV$, this rarefaction conserves the specific enthalpy, which makes it thermodynamically equivalent to a JT throttling process. We observe JT heating in an ideal Fermi gas, stronger at higher quantum degeneracy, a result of the repulsive quantum-statistical `force' arising from Pauli blocking. In a unitary Fermi gas, we observe that the JT heating is marginal in the temperature range $0.2 \lesssim T/T_{\mathrm{F}} \lesssim 0.8 $ as the repulsive quantum-statistical effect is lessened by the attractive interparticle interaction. |
| title | Observation of the Fermionic Joule-Thomson Effect |
| topic | Quantum Gases Statistical Mechanics Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2305.16320 |