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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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Official URL: http://dx.doi.org/ 10.1038/srep06655


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
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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