Quantum phase transition between one-channel and two-channel Kondo polarons
Strongly Correlated Electrons
2013-11-14 v1 Quantum Gases
Abstract
For a mobile spin-1/2 impurity, coupled antiferromagnetically to a one-dimensional gas of fermions, perturbative ideas have been used to argue in favor of two-channel Kondo behavior of the impurity spin. Here we combine general considerations and extensive numerical simulations to show that the problem displays a novel quantum phase transition between two-channel and one-channel Kondo screening upon increasing the Kondo coupling. We construct a ground-state phase diagram and discuss the various non-trivial crossovers as well as possible experimental realizations.
Cite
@article{arxiv.1306.6563,
title = {Quantum phase transition between one-channel and two-channel Kondo polarons},
author = {Julian Rincon and Daniel J. Garcia and K. Hallberg and Matthias Vojta},
journal= {arXiv preprint arXiv:1306.6563},
year = {2013}
}
Comments
5+4 pages, 5+3 figs