Bloch oscillations in Fermi gases

TL;DR

This paper investigates the conditions under which Bloch oscillations can occur in superfluid Fermi gases in optical lattices, analyzing effects of temperature, band filling, and the BCS-BEC crossover.

Contribution

It introduces a framework for observing Bloch oscillations in superfluid Fermi gases, considering temperature effects and the BCS-BEC crossover.

Findings

Oscillations suppressed at high temperatures and band fillings for one-component gases.

Landau criterion used to identify regimes for observable Bloch oscillations.

Amplitude of oscillations varies along the BCS-BEC crossover.

Abstract

The possibility of Bloch oscillations for a degenerate and superfluid Fermi gas of atoms in an optical lattice is considered. For a one-component degenerate gas the oscillations are suppressed for high temperatures and band fillings. For a two-component gas the Landau criterion is used for specifying the regime where Bloch oscillations of the superfluid may be observed. We show how the amplitude of Bloch oscillations varies along the BCS-BEC crossover.