Observation of the Fermionic Joule-Thomson Effect
Observation of the Fermionic Joule-Thomson Effect
复制标题
费米子焦耳-汤姆逊效应的观察
DOI：
10.1103/physrevlett.132.153402
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发表时间：
2024
影响因子：
8.6
通讯作者：
Navon, Nir
中科院分区：
文献类型：
--
作者：
Ji, Yunpeng;Chen, Jianyi;Schumacher, Grant L.;Assumpção, Gabriel G. T.;Huang, Songtao;Vivanco, Franklin J.;Navon, Nir
我们报道了在理想和统一费米气体中首次观测到的量子焦耳-汤姆逊（JT）效应。我们研究了这些系统在经历每粒子能量守恒稀薄时的温度动力学。对于状态方程满足此关系式的标度不变系统，这种稀薄性保留了比焓，使其在热力学上等同于JT节流过程。我们观察到JT在理想费米气体中加热，这是泡利阻塞的直接结果。在单一费米气体中，我们观察到JT加热在温度范围内是边缘的，排斥量子统计效应被吸引粒子间的相互作用所减弱。
We report the first 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, 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, a direct consequence of Pauli blocking. In a unitary Fermi gas, we observe that the JT heating is marginal in the temperature rangeas the repulsive quantum-statistical effect is lessened by the attractive interparticle interactions.