Phase detection in an ultracold polarized Fermi gas via electromagnetically induced transparency

An optical detection scheme based on electromagnetically induced transparency is proposed to investigate the nature of Fermi pairing in a trapped strongly interacting two-component atomic Fermi gas with population imbalance. We show that valuable information can be acquired from the in situ probe absorption spectrum to identify different phases existing in the system.

► We propose an optical detection scheme for a trapped two-component Fermi gas with population imbalance. ► This scheme is based on electromagnetically induced transparency and principally non-destructive. ► We calculate the phase diagram and the corresponding probe absorption spectra. ► The probe spectra can provide valuable information on Fermi pairing in the system.