Fermionic superfluid from a bilayer band insulator in an optical lattice

Prasad, Yogeshwar and Medhi, Amal and Shenoy, Vijay B (2014) Fermionic superfluid from a bilayer band insulator in an optical lattice. In: PHYSICAL REVIEW A, 89 (4).

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Abstract

We propose a model to realize a fermionic superfluid state in an optical lattice circumventing the cooling problem. Our proposal exploits the idea of tuning the interaction in a characteristically low-entropy state, a band insulator in an optical bilayer system, to obtain a superfluid. By performing a detailed analysis of the model including fluctuations and augmented by a variational quantum Monte Carlo calculation of the ground state, we show that the superfluid state obtained has a high transition temperature of the order of the hopping energy. Our system is designed to suppress other competing orders such as a charge density wave. We suggest a laboratory realization of this model via an orthogonally shaken optical lattice bilayer.

Item Type:	Journal Article
Publication:	PHYSICAL REVIEW A
Publisher:	AMER PHYSICAL SOC
Additional Information:	copyright for this article belongs to AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	28 May 2014 05:50
Last Modified:	28 May 2014 05:55
URI:	http://eprints.iisc.ac.in/id/eprint/49073

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