The normal phase of an imbalanced Fermi gas

Details The normal phase of an imbalanced Fermi gas The normal phase of an imbalanced Fermi gas

2010-02-28

arxiv.org/abs/1003.0213v2

Phys. Rev. Lett. 104, 230402 (2010)

Physics

Condensed Matter

Quantum Gases

4 pages, 2 figures, published in PRL

Scientific paper

10.1103/PhysRevLett.104.230402

Recent experiments on imbalanced Fermi gases have raised interest in the physics of an impurity immersed in a Fermi sea, the so-called Fermi polaron. In this letter, a simple theory is devised to describe dilute Fermi-polaron ensembles corresponding to the normal phase of an imbalanced Fermi gas. An exact formula is obtained for the dominant interaction between polarons, expressed solely in terms of a single polaron parameter. The physics of this interaction is identified as a signature of the Pauli exclusion principle.

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