Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas

Details Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas

2010-10-09

arxiv.org/abs/1010.1874v1

Phys. Rev. Lett. 106, 010402 (2011)

Physics

Condensed Matter

Quantum Gases

Scientific paper

10.1103/PhysRevLett.106.010402

Spin fluctuations and density fluctuations are studied for a two-component gas of strongly interacting fermions along the BEC-BCS crossover. This is done by in-situ imaging of dispersive speckle patterns. Compressibility and magnetic susceptibility are determined from the measured fluctuations. This new sensitive method easily resolves a tenfold suppression of spin fluctuations below shot noise due to pairing, and can be applied to novel magnetic phases in optical lattices.

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