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Observation of the Fermionic Joule-Thomson Effect
- Source :
- Phys. Rev. Lett. 132 (2024) 153402
- Publication Year :
- 2023
-
Abstract
- 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.<br />Comment: 13 pages, 12 figures
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 132 (2024) 153402
- Publication Type :
- Report
- Accession number :
- edsarx.2305.16320
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.132.153402