Prospects for p-wave paired BCS states of fermionic atoms

TL;DR

This paper explores the theoretical feasibility of creating p-wave paired BCS superfluid states in fermionic atoms like potassium and rubidium using electric fields to control interactions, potentially achievable with current cooling and trapping technologies.

Contribution

It proposes a method to realize p-wave superfluidity in fermionic atoms by controlling atom-atom interactions with electric fields, expanding possibilities for quantum degenerate fermionic gases.

Findings

p-wave pairing with specific isotopes is promising for superfluid BCS states

electric fields can control interaction strength and anisotropy

current technology may realize these states in the near future

Abstract

We present theoretical prospects for creating p-wave paired BCS states of magnetic trapped fermionic atoms. Based on our earlier proposal of using dc electric fields to control both the strength and anisotropic characteristic of atom-atom interaction and our recently completed multi-channel atomic collision calculations we discover that p-wave pairing with $^{40}$K and $^{82,84,86}$Rb in the low field seeking maximum spin polarized state represent excellent choices for achieving superfluid BCS states; and may be realizable with current technology in laser cooling, magnetic trapping, and evaporative/sympathetic cooling, provided the required strong electric field can be applied. We also comment on the prospects of similar p-wave paired BCS states in $^{6}$Li, and more generally on creating other types exotic BCS states. Our study will open a new area in the vigorous pursuit to create a quantum degenerate fermionic atom vapor.