Modified spin-wave theory and spin liquid behavior of cold bosons on an inhomogeneous triangular lattice
Quantum Gases
2016-08-10 v2 Strongly Correlated Electrons
Quantum Physics
Abstract
Ultracold bosons in a triangular lattice are a promising candidate for observing quantum spin liquid behavior. Here we investigate, for such system, the role of a harmonic trap giving rise to an inhomogeneous density. We construct a modified spin-wave theory for arbitrary filling, and predict the breakdown of order for certain values of the lattice anisotropy. These regimes, identified with the spin liquid phases, are found to be quite robust upon changes in the filling factor. This result is backed by an exact diagonalization study on a small lattice.
Keywords
Cite
@article{arxiv.1603.06561,
title = {Modified spin-wave theory and spin liquid behavior of cold bosons on an inhomogeneous triangular lattice},
author = {Alessio Celi and Tobias Grass and Andrew J. Ferris and Bikash Padhi and David Raventos and Juliette Simonet and Klaus Sengstock and Maciej Lewenstein},
journal= {arXiv preprint arXiv:1603.06561},
year = {2016}
}
Comments
16 pages, 16 figures; v2 references added, minor changes