Pairing Dynamics of Polar States in a Quenched p-wave Superfluid Fermi Gas

TL;DR

This paper investigates the non-equilibrium pairing dynamics in a p-wave superfluid Fermi gas after a sudden interaction change, highlighting the effects of anisotropy and centrifugal barriers on the evolution of momentum occupation.

Contribution

It reveals how anisotropic interactions and centrifugal barriers uniquely influence the pairing dynamics in p-wave superfluids following quenches.

Findings

Large oscillatory depletion of momentum occupation in the BCS regime

Significant filling of momentum states depending on quench direction

Resonant states supported by centrifugal barriers play a crucial role

Abstract

We study the pairing dynamics of polar states in a single species p-wave superfluid Fermi gas following a sudden change of the interaction strength. The anisotropy of pair interaction together with the presence of the centrifugal barrier results in profoundly different pairing dynamics compared to the s-wave case. Depending on the direction of quenches, quench to the BCS regime results in a large oscillatory depletion of momentum occupation inside the Fermi sea or a large filling of momentum occupation. We elucidate a crucial role of the resonant state supported by the centrifugal barrier in the pairing dynamics.