High-frequency tail of the radio-frequency spectrum in a unitary Fermi gas with particle-hole fluctuation

摘要

The contact plays an important role in the study of ultracold atoms. We determine the contact from the high-frequency asymptotic behavior of radio-frequency spectrum for a homogeneous Fermi gas at unitarity in the normal phase. The contact is obtained within the framework of the non-self-consistent T-matrix approximation with particle- hole fluctuation.