Antiferrosmectic ground state of two-component dipolar Fermi gases -- an analog of meson condensation in nuclear matter

TL;DR

This paper predicts a new antiferrosmectic-C phase in high-density two-component dipolar Fermi gases, resembling meson condensation in nuclear matter, characterized by layered fermion localization and pseudospin alignment.

Contribution

It introduces the antiferrosmectic-C phase as energetically favorable in high-density dipolar Fermi gases, drawing an analogy to meson condensation in nuclear physics.

Findings

Antiferrosmectic-C phase has lower energy than other phases at high densities.

The phase features layered fermion localization with staggered pseudospin alignment.

This phase is analogous to meson condensation in nuclear matter.

Abstract

We show that an antiferrosmectic-C phase has lower energy at high densities than the non-magnetized Fermi gas and ferronematic phases in an ultracold gas of fermionic atoms, or molecules, with large magnetic dipole moments. This phase, which is analogous to meson condensation in dense nuclear matter, is a one-dimensional periodic structure in which the fermions localize in layers with their pseudospin direction aligned parallel to the layers, and staggered layer by layer.