Five-Body Efimov Effect and Universal Pentamer in Fermionic Mixtures
Quantum Gases
2017-02-28 v2 Atomic Physics
Quantum Physics
Abstract
We show that four heavy fermions interacting resonantly with a lighter atom (4+1 system) become Efimovian at mass ratio 13.279(2), which is smaller than the corresponding 2+1 and 3+1 thresholds. We thus predict the five-body Efimov effect for this system in the regime where any of its subsystem is non- Efimovian. For smaller mass ratios we show the existence and calculate the energy of a universal 4+1 pentamer state, which continues the series of the 2+1 trimer predicted by Kartavtsev and Malykh and 3+1 tetramer discovered by Blume. We also show that the effective-range correction for the light-heavy interaction has a strong effect on all these states and larger effective ranges increase their tendency to bind.
Cite
@article{arxiv.1612.09341,
title = {Five-Body Efimov Effect and Universal Pentamer in Fermionic Mixtures},
author = {Betzalel Bazak and Dmitry S. Petrov},
journal= {arXiv preprint arXiv:1612.09341},
year = {2017}
}