Phase diagram of a strongly interacting spin-imbalanced Fermi gas

Ben A. Olsen, Melissa C. Revelle, Jacob A. Fry, Daniel E. Sheehy, and Randall G. Hulet
Phys. Rev. A 92, 063616 – Published 9 December 2015

Abstract

We obtain the phase diagram of spin-imbalanced interacting Fermi gases from measurements of density profiles of Li6 atoms in a harmonic trap. These results agree with, and extend, previous experimental measurements. Measurements of the critical polarization at which the balanced superfluid core vanishes generally agree with previous experimental results and with quantum Monte Carlo (QMC) calculations in the Bardeen-Cooper-Schrieffer and unitary regimes. We disagree with the QMC results in the Bose-Einstein condensate regime, however, where the measured critical polarizations are greater than theoretically predicted. We also measure the equation of state in the crossover regime for a gas with equal numbers of the two fermion spin states.

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  • Received 25 August 2015

DOI:https://doi.org/10.1103/PhysRevA.92.063616

©2015 American Physical Society

Authors & Affiliations

Ben A. Olsen1, Melissa C. Revelle1, Jacob A. Fry1, Daniel E. Sheehy2, and Randall G. Hulet1,*

  • 1Department of Physics & Astronomy and Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA
  • 2Department of Physics & Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA

  • *randy@rice.edu

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Issue

Vol. 92, Iss. 6 — December 2015

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