Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas

Abstract

We have observed phase separation between the superfluid and the normal component in a strongly interacting Fermi gas with imbalanced spin populations. The in situ distribution of the density difference between two trapped spin components is obtained using phase-contrast imaging and 3D image reconstruction. A shell structure is clearly identified where the superfluid region of equal densities is surrounded by a normal gas of unequal densities. The phase transition induces a dramatic change in the density profiles as excess fermions are expelled from the superfluid.

5 pages, 7 figures

References in corpus (3)

• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• Ultracold polarized Fermi gas at intermediate temperatures

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