An atomic colour superfluid via three-body loss

TL;DR

This paper explores how large three-body losses in a three-component Fermi gas can stabilize novel superfluid phases by effectively constraining site occupation, with detailed theoretical and numerical analysis relevant to lithium experiments.

Contribution

It introduces a new perspective on stabilizing superfluid phases through three-body loss constraints, combining bosonisation and DMRG techniques for analysis.

Findings

Three-body loss constraints suppress trion formation.

Stabilization of BCS pairing phases in constrained systems.

Insights into dissipative dynamics with loss using time-dependent DMRG.

Abstract

Large three-body losses in a three-component Fermi gas confined in an optical lattice can prevent the occupation of a lattice site by three atoms. This effective constraint not only gives rise to a suppression of actual three-body loss, but stabilises BCS pairing phases by suppressing the formation of trions. We study the effects of the constraint using bosonisation and density matrix renormalisation group techniques (DMRG). We discuss the case of lithium experiments, and study the dissipative dynamics including loss using time-dependent DMRG with quantum trajectories methods.