Topological Quantum Liquids with Long-Range Couplings
Abstract
Very few topological systems with long-range couplings have been considered so far due to our lack of analytic approaches. Here we extend the Kitaev chain, a 1D quantum liquid, to infinite-range couplings and study its topological properties. We demonstrate that, even though topological phases are intimately linked to the notion of locality, the infinite-range couplings give rise to topological zero and non-zero energy Majorana end modes depending on the boundary conditions of the system. We show that the analytically derived properties are to a large degree stable against modifications to decaying long-range couplings. Our work opens new frontiers for topological states of matter that are relevant to current experiments where suitable interactions can be designed.
Keywords
Cite
@article{arxiv.1611.00796,
title = {Topological Quantum Liquids with Long-Range Couplings},
author = {Kristian Patrick and Titus Neupert and Jiannis K. Pachos},
journal= {arXiv preprint arXiv:1611.00796},
year = {2020}
}
Comments
5+5 pages, 3+1 figures, presentation improved and references updated