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16 April 2024

» arxiv » 1204.4229

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Compressibility of an Ultracold Fermi Gas with Repulsive Interactions
Ye-Ryoung Lee ; Myoung-Sun Heo ; Jae-Hoon Choi ; Tout T. Wang ; Caleb A. Christensen ; Timur M. Rvachov ; Wolfgang Ketterle ;
Date:	19 Apr 2012
Abstract:	Fermi gases with repulsive interactions are characterized by measuring their compressibility as a function of interaction strength. The compressibility is obtained from in-trap density distributions monitored by phase contrast imaging. For interaction parameters k_F a > 0.25 fast decay of the gas prevents the observation of equilibrium profiles. For smaller interaction parameters, the results are adequately described by first-order perturbation theory. A novel phase contrast imaging method compensates for dispersive distortions of the images.
Source:	arXiv, 1204.4229
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