Local observation of antibunching in a trapped Fermi gas

Details Local observation of antibunching in a trapped Fermi gas Local observation of antibunching in a trapped Fermi gas

2010-05-03

arxiv.org/abs/1005.0302v3

Phys. Rev. Lett. 104, 040401 (2010)

Physics

Condensed Matter

Quantum Gases

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.104.040401

Local density fluctuations and density profiles of a Fermi gas are measured in-situ and analyzed. In the quantum degenerate regime, the weakly interacting $^6$Li gas shows a suppression of the density fluctuations compared to the non-degenerate case, where atomic shot noise is observed. This manifestation of antibunching is a direct result of the Pauli principle and constitutes a local probe of quantum degeneracy. We analyze our data using the predictions of the fluctuation-dissipation theorem and the local density approximation, demonstrating a fluctuation-based temperature measurement.

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