Fermionic stabilization and density-wave ground state of a polar condensate

TL;DR

This paper investigates how adding fermions to a dipolar condensate can stabilize it and lead to a density-wave ground state, revealing new stable phases influenced by boson-fermion interactions.

Contribution

It demonstrates that fermion admixture stabilizes dipolar condensates and induces a density-wave ground state, a novel finding in quantum gas research.

Findings

Fermions stabilize dipolar condensates against instability.

A density-wave ground state emerges in the stabilized regime.

Stability depends on boson-fermion interaction strength.

Abstract

We examine the stability of a trapped dipolar condensate mixed with a single-component fermion gas at T=0. Whereas pure dipolar condensates with small s-wave interaction are unstable even for small dipole-dipole interaction strength, we find that the admixture of fermions can significantly stabilize them, depending on the strength of the boson-fermion interaction. Within the stable regime we find a region where a ground state is characterized by a density wave along the soft trap direction.