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arXiv · 1102.0896

Efimov physics from the functional renormalization group

Stefan Floerchinger·Sergej Moroz·Richard Schmidt
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Abstract

Few-body physics related to the Efimov effect is discussed using the functional renormalization group method. After a short review of renormalization in its modern formulation we apply this formalism to the description of scattering and bound states in few-body systems of identical bosons and distinguishable fermions with two and three components. The Efimov effect leads to a limit cycle in the renormalization group flow. Recently measured three-body loss rates in an ultracold Fermi gas $^6$Li atoms are explained within this framework. We also discuss briefly the relation to the many-body physics of the BCS-BEC crossover for two-component fermions and the formation of a trion phase for the case of three species.

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Stefan Floerchinger, Sergej Moroz, Richard Schmidt. 2011-02-04. Efimov physics from the functional renormalization group. https://doi.org/10.1007/s00601-011-0231-z

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