An impurity immersed in a double Fermi Sea
Quantum Gases
2020-09-23 v1
Abstract
We present a variational calculation of the energy of an impurity immersed a double Fermi sea of non-interacting Fermions. We show that in the strong-coupling regime, the system undergoes a first order transition between polaronic and trimer states. Our result suggests that the smooth crossover predicted in previous literature for a superfluid background is the consequence of Cooper pairing and is absent in a normal system.
Cite
@article{arxiv.2004.12759,
title = {An impurity immersed in a double Fermi Sea},
author = {Ragheed Alhyder and Xavier Leyronas and Frederic Chevy},
journal= {arXiv preprint arXiv:2004.12759},
year = {2020}
}