Stability of quantum degenerate Fermi gases of tilted polar molecules
Abstract
A recent experimental realization of quantum degenerate gas of KRb molecules opens up prospects of exploring strong dipolar Fermi gases and many-body phenomena arising in that regime. Here we derive a mean-field variational approach based on the Wigner function for the description of ground-state properties of such systems. We show that the stability of dipolar fermions in a general harmonic trap is universal as it only depends on the trap aspect ratios and the dipoles' orientation. We calculate the species-independent stability diagram and the deformation of the Fermi surface (FS) for polarized molecules, whose electric dipoles are oriented along a preferential direction. Compared to atomic magnetic species, the stability of a molecular electric system turns out to strongly depend on its geometry and the FS deformation significantly increases.
Keywords
Cite
@article{arxiv.1902.09518,
title = {Stability of quantum degenerate Fermi gases of tilted polar molecules},
author = {Vladimir Veljic and Axel Pelster and Antun Balaz},
journal= {arXiv preprint arXiv:1902.09518},
year = {2019}
}
Comments
6 + 5 pages, 5 + 3 figures; accepted for publication in Phys. Rev. Research