Detection of Fermi Pairing via Electromagnetically Induced Transparency

TL;DR

This paper proposes an optical spectroscopic method using electromagnetically-induced transparency (EIT) to detect Fermi pairing in ultracold Fermi gases, enabling non-destructive, rapid spectral analysis.

Contribution

It introduces a novel EIT-based technique for probing Fermi pairing, offering a nearly non-destructive and fast spectroscopic method for ultracold gases.

Findings

EIT spectra reveal signatures of Fermi pairing.

The method allows rapid spectral measurement without re-preparing the sample.

A quasiparticle model explains the pairing signatures in the spectra.

Abstract

An optical spectroscopic method based on the principle of electromagnetically-induced transparency (EIT) is proposed as quite a generic probing tool that provides valuable insights into the nature of Fermi paring in ultracold Fermi gases of two hyperfine states. This technique has the capability of allowing spectroscopic response to be determined in a nearly non-destructive manner and the whole spectrum may be obtained by scanning the probe laser frequency faster than the lifetime of the sample without re-preparing the atomic sample repeatedly. A quasiparticle picture is constructed to facilitate a simple physical explanation of the pairing signature in the EIT spectra.