Finite Temperature Momentum Distribution of a Trapped Fermi Gas

Details Finite Temperature Momentum Distribution of a Trapped Fermi Gas Finite Temperature Momentum Distribution of a Trapped Fermi Gas

2006-04-20

arxiv.org/abs/cond-mat/0604469v1

Phys. Rev. A 74, 011601(R) (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

10.1103/PhysRevA.74.011601

We present measurements of the temperature-dependent momentum distribution of a trapped Fermi gas consisting of $^{40}$K in the BCS-BEC crossover regime. Accompanying theoretical results based upon a simple mean-field ground state are compared to the experimental data. Non-monotonic effects associated with temperature, $T$, arise from the competition between thermal broadening and a narrowing of the distribution induced by the decrease in the excitation gap $\Delta(T)$ with increasing $T$.

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