• Featured in Physics

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, and Wolfgang Ketterle
Phys. Rev. A 85, 063615 – Published 21 June 2012
Physics logo See Synopsis: Ephemeral Fermions

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 kFa>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. We have developed a phase-contrast imaging method that compensates for dispersive distortions of the images.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 18 April 2012

DOI:https://doi.org/10.1103/PhysRevA.85.063615

©2012 American Physical Society

Synopsis

Key Image

Ephemeral Fermions

Published 21 June 2012

The compressibility of a gas of repulsive fermions has been measured with a novel imaging technique.

See more in Physics

Authors & Affiliations

Ye-Ryoung Lee1, Myoung-Sun Heo1, Jae-Hoon Choi1, Tout T. Wang1,2, Caleb A. Christensen1, Timur M. Rvachov1, and Wolfgang Ketterle1

  • 1MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 2MIT-Harvard Center for Ultracold Atoms, Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 85, Iss. 6 — June 2012

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×