Interaction Induced Topological Charge Pump
Quantum Gases
2020-11-04 v2 Mesoscale and Nanoscale Physics
Statistical Mechanics
Strongly Correlated Electrons
Abstract
Based on a topological transition of the symmetry protected topological phase (SPT), an interaction induced topological charge pump (iTCP) is proposed with the symmetry breaking parameter as a synthetic dimension. It implies that the phase boundary of the SPT is the topological obstruction although iTCP and the gap closing singularity is stable for symmetry breaking perturbations. We have confirmed the bulk-edge correspondence for this iTCP using DMRG for the Rice-Mele model with nearest-neighbor interactions. As for a realization in optical lattices, an interaction sweeping pump protocol is proposed as well.
Cite
@article{arxiv.2007.11215,
title = {Interaction Induced Topological Charge Pump},
author = {Yoshihito Kuno and Yasuhiro Hatsugai},
journal= {arXiv preprint arXiv:2007.11215},
year = {2020}
}
Comments
5+2 pages, 4+4 figures