Measurement of the entropy and critical temperature of a strongly interacting fermi gas

被引：130

作者：

Luo, L. ^{[1
]}

Clancy, B. ^{[1
]}

Joseph, J. ^{[1
]}

Kinast, J. ^{[1
]}

Thomas, J. E. ^{[1
]}

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.98.080402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a model-independent measurement of the entropy, energy, and critical temperature of a degenerate, strongly interacting Fermi gas of atoms. The total energy is determined from the mean square cloud size in the strongly interacting regime, where the gas exhibits universal behavior. The entropy is measured by sweeping a bias magnetic field to adiabatically tune the gas from the strongly interacting regime to a weakly interacting regime, where the entropy is known from the cloud size after the sweep. The dependence of the entropy on the total energy quantitatively tests predictions of the finite-temperature thermodynamics.

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页数：4

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