Improved variational approach to the two-site Bose-Hubbard model
Quantum Gases
2015-05-30 v1
Abstract
An improved variational ansatz is proposed to capture the most striking properties of the ground state of a slightly biased attractive two-site Bose-Hubbard Hamiltonian. Our ansatz, albeit its simplicity, is found to capture well the exact properties of the ground state for a wide variety of model parameters, in particular the fragmentation occurring before the formation of cat-like states and also the formation of strongly correlated cat-like states.
Cite
@article{arxiv.1108.4851,
title = {Improved variational approach to the two-site Bose-Hubbard model},
author = {Marina Melé-Messeguer and Bruno Juliá-Díaz and Artur Polls},
journal= {arXiv preprint arXiv:1108.4851},
year = {2015}
}
Comments
Accepted for publication in the Journal of Low Temperature Physics