Dynamics of optically generated vortices in a one-component ultracold fermionic gases

TL;DR

This paper demonstrates that phase imprinting can generate vortices in ultracold fermionic gases, revealing unique vortex dynamics and geometry-dependent behaviors that may indicate superfluidity due to Cooper pairing.

Contribution

It introduces the use of phase imprinting for vortex creation in fermionic gases and explores how trap geometry influences vortex stability and dynamics.

Findings

Vortices can be generated in fermionic gases via phase imprinting.

Vortex dynamics differ significantly from Bose-Einstein condensates.

Asymmetric traps prevent the formation of single vortex states.

Abstract

We show that the phase imprinting method is capable of generating vortices in a one-component gas of neutral fermionic atoms at zero and finite temperatures. We find qualitative differences in dynamics of vortices in comparision with the case of Bose-Einstein condensate. The results of the imprinting strongly depend on the geometry of the trap, e.g., in asymmetric traps no single vortex state exists. The observations could be considered as a signature of Cooper-pair based superfluidity in a Fermi gas.