Phys. Rev. Lett. 88, 040405 (2002) [4 pages]Spin Excitations in a Fermi Gas of AtomsReceived 30 August 2001; published 11 January 2002 We have experimentally investigated a spin excitation in a quantum degenerate Fermi gas of atoms. In the hydrodynamic regime the damping time of the collective excitation is used to probe the quantum behavior of the gas. At temperatures below the Fermi temperature we measure up to a factor of 2 reduction in the excitation damping time compared to the classical expectation. In addition, we observe a strong excitation energy dependence for this quantum statistical effect. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.040405
DOI:
10.1103/PhysRevLett.88.040405
PACS:
05.30.Fk
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