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TT: Fachverband Tiefe Temperaturen

TT 69: Other Low Temperature Topics: Cold Atomic Gases

TT 69.10: Vortrag

Mittwoch, 18. März 2015, 17:30–17:45, A 053

Second order interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions — •Jan Krieg, Philipp Lange, and Peter Kopietz — Institut für Theoretische Physik, Universität Frankfurt, Germany

We have calculated 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 have found 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.