Cooling a Band Insulator with a Metal: Fermionic Superfluid in a Dimerized Holographic Lattice

Haldar, Arijit and Shenoy, Vijay B (2014) Cooling a Band Insulator with a Metal: Fermionic Superfluid in a Dimerized Holographic Lattice. In: SCIENTIFIC REPORTS, 4 .

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Abstract

A cold atomic realization of a quantum correlated state of many fermions on a lattice, eg. superfluid, has eluded experimental realization due to the entropy problem. Here we propose a route to realize such a state using holographic lattice and confining potentials. The potentials are designed to produces aband insulating state (low heat capacity) at the trap center, and a metallic state (high heat capacity) at the periphery. The metal ``cools'' the central band insulator by extracting out the excess entropy. The central band insulator can be turned into a superfluid by tuning an attractive interaction between the fermions. Crucially, the holographic lattice allows the emergent superfluid to have a high transition temperature - even twice that of the effective trap temperature. The scheme provides a promising route to a laboratory realization of a fermionic lattice superfluid, even while being adaptable to simulate other many body states.

Item Type:	Journal Article
Publication:	SCIENTIFIC REPORTS
Publisher:	NATURE PUBLISHING GROUP
Additional Information:	Copy right for this article belongs to the NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	20 Nov 2014 05:01
Last Modified:	20 Nov 2014 05:01
URI:	http://eprints.iisc.ac.in/id/eprint/50314

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