Spectroscopic Temperature Determination of Degenerate Fermi Gases

Abstract

We suggest a simple method for measuring the temperature of ultra-cold gases made of fermions. We show that by using a two-photon Raman probe, it is possible to obtain lineshapes which reveal properties of the degenerate sample, notably its temperature $T$. The proposed method could be used with identical fermions in different hyperfine states interacting via s-wave scattering or identical fermions in the same hyperfine state via p-wave scattering. We illustrate the applicability of the method in realistic conditions for ${}^6$Li prepared in two different hyperfine states. We find that temperatures down to 0.05 $T_F$ can be determined by this {\it in-situ} method.

7 pages, 4 figures, Revtex4

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Cited by in corpus (1)

• Probing ultra-cold Fermi atoms with a single ion