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Optical lattice implementation scheme of a bosonic topological model with fermionic atoms

Tue, 2014-01-07 17:19 - Mari-Carmen Banuls
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Date: 
2014-01-07
Author(s): 

Anne E. B. Nielsen, German Sierra, and J. Ignacio Cirac

Reference: 

arXiv:1311.7684 [cond-mat.str-el]

URL: 

http://arxiv.org/abs/1311.7684

We present a scheme to implement a Fermi-Hubbard-like model in ultracold atoms in optical lattices and analyze the topological features of its ground state. In particular, we show that the ground state for appropriate parameters has a large overlap with a lattice version of the bosonic Laughlin state at filling factor one half. The scheme utilizes laser assisted and normal tunnelling in a checkerboard optical lattice. The requirements on temperature, interactions, and hopping strengths are similar to those needed to observe the N\'eel antiferromagnetic ordering in the standard Fermi-Hubbard model in the Mott insulating regime.