Secondorder interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions
Abstract
We calculate the renormalized Fermi surface and the quasiparticle properties in the Fermi liquid phase of threedimensional dipolar fermions to second order in the dipoledipole interaction. Using parameters relevant to an ultracold gas of erbium atoms, we find that the secondorder corrections typically renormalize the HartreeFock results by less than 1%. On the other hand, if we use the secondorder correction to the compressibility to estimate the regime of stability of the system, the point of instability is already reached for a significantly smaller interaction strength than in the HartreeFock approximation.
 Publication:

Physical Review A
 Pub Date:
 February 2015
 DOI:
 10.1103/PhysRevA.91.023612
 arXiv:
 arXiv:1412.0019
 Bibcode:
 2015PhRvA..91b3612K
 Keywords:

 03.75.Ss;
 67.85.d;
 71.10.Ay;
 Degenerate Fermi gases;
 Ultracold gases trapped gases;
 Fermiliquid theory and other phenomenological models;
 Condensed Matter  Quantum Gases
 EPrint:
 10 pages, 7 figures