Polarons in a Dipolar Condensate

Ben Kain; Hong Y. Ling

doi:10.1103/physreva.89.023612

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arXiv · 1401.2961

Polarons in a Dipolar Condensate

Ben Kain·Hong Y. Ling

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Abstract

We consider a polaronic model in which impurity fermions interact with background bosons in a dipolar condensate. The polaron in this model emerges as an impurity dressed with a cloud of phonons of the dipolar condensate, which, due to the competition between the attractive and repulsive part of the dipole-dipole interaction, obey an anisotropic dispersion spectrum. We study how this anisotropy affects the Cerenkov-like emission of Bogoliubov phonon modes, which can be directly verified by experiments in which a dipolar BEC moves against an obstacle. We also study the spectral function of impurity fermions, which is directly accessible to the momentum resolved rf spectroscopy in cold atoms.

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Ben Kain, Hong Y. Ling. 2014-01-27. Polarons in a Dipolar Condensate. https://doi.org/10.1103/physreva.89.023612

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