Observation of the Fermionic Joule-Thomson Effect
- URL: http://arxiv.org/abs/2305.16320v1
- Date: Thu, 25 May 2023 17:59:51 GMT
- Title: Observation of the Fermionic Joule-Thomson Effect
- Authors: Yunpeng Ji, Jianyi Chen, Grant L. Schumacher, Gabriel G. T.
Assump\c{c}\~ao, Songtao Huang, Franklin J. Vivanco and Nir Navon
- Abstract summary: We report the observation of the quantum Joule-Thomson (JT) effect in ideal and unitary Fermi gases.
For scale-invariant systems, whose equations of state satisfy the relation $Upropto PV$, this rarefaction conserves the specific enthalpy.
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.
- Score: 1.2006896500048554
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- 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.
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