P-Wave Contact Tensor -- Universal Properties of Axisymmetry-Broken P-Wave Fermi Gases

TL;DR

This paper explores the universal properties of axisymmetry-broken p-wave Fermi gases, introducing a nine-component contact tensor that characterizes short-range correlations and can be experimentally measured.

Contribution

It introduces the p-wave contact tensor as a universal descriptor for anisotropic p-wave Fermi gases and proposes an experimental method to measure it.

Findings

The p-wave contact tensor fully characterizes short-range correlations.

Distinct features of the contact tensor appear in both normal and superfluid phases.

An experimental scheme to measure the contact tensor is proposed.

Abstract

We investigate universal properties of a p-wave Fermi gas with a resonant interaction in which the axisymmetry is broken spontaneously or externally. Here, the short-range correlations can be completely characterized by the nine-component p-wave contact tensor, which can be measured by applying a generalized adiabatic sweep theorem. The distinctive features of the p-wave contact tensor emerge in a normal p-wave Fermi gas in an anisotropic trap and in a superfluid phase. An experimental scheme to measure the p-wave contact tensor and test the adiabatic sweep theorem is also discussed.