Renormalization group approach to the Fr\"ohlich polaron model: application to impurity-BEC problem
Quantum Gases
2016-05-03 v1 Mesoscale and Nanoscale Physics
Abstract
We develop a renormalization group approach for analyzing Fr\"ohlich polarons and apply it to a problem of impurity atoms immersed in a Bose-Einstein condensate of ultra cold atoms. Polaron energies obtained by our method are in excellent agreement with recent diagrammatic Monte Carlo calculations for a wide range of interaction strengths. We calculate the effective mass of polarons and find a smooth crossover from weak to strong coupling regimes. Possible experimental tests of our results in current experiments with ultra cold atoms are discussed.
Cite
@article{arxiv.1410.2203,
title = {Renormalization group approach to the Fr\"ohlich polaron model: application to impurity-BEC problem},
author = {F. Grusdt and Y. E. Shchadilova and A. N. Rubtsov and E. Demler},
journal= {arXiv preprint arXiv:1410.2203},
year = {2016}
}
Comments
13 pages, 7 figures