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arXiv · 1412.0019

Second-order interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions

Jan Krieg·Philipp Lange·Lorenz Bartosch·Peter Kopietz
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Abstract

We calculate the renormalized Fermi surface and the quasiparticle properties in the Fermi liquid phase of three-dimensional dipolar fermions to second order in the dipole-dipole interaction. Using parameters relevant to an ultracold gas of erbium atoms, we find that the second-order corrections typically renormalize the Hartree-Fock results by less than one percent. On the other hand, if we use the second-order 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 Hartree-Fock approximation.

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Jan Krieg, Philipp Lange, Lorenz Bartosch, Peter Kopietz. 2015-03-03. Second-order interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions. https://doi.org/10.1103/physreva.91.023612

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