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Particle-hole symmetric localization in optical lattices using time modulated random on-site potentials

Zou, Yue and Barnett, Ryan and Refael, Gil (2010) Particle-hole symmetric localization in optical lattices using time modulated random on-site potentials. Physical Review B, 82 (22). Art. No. 224205. ISSN 1098-0121. doi:10.1103/PhysRevB.82.224205.

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The random hopping models exhibit many fascinating features, such as diverging localization length and density of states as energy approaches the band center due to its particle-hole symmetry. Nevertheless, such models are yet to be realized experimentally because the particle-hole symmetry is easily destroyed by diagonal disorder. Here we propose that a pure random hopping model can be effectively realized in ultracold atoms by modulating a disordered onsite potential in particular frequency ranges. This idea is motivated by the recent development of the phenomena called “dynamical localization” or “coherent destruction of tunneling.” Investigating the application of this idea in one dimension, we find that if the oscillation frequency of the disorder potential is gradually increased from zero to infinity, one can tune a noninteracting system from an Anderson insulator to a random hopping model with diverging localization length at the band center, and eventually to a uniform-hopping tight-binding model.

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Additional Information:© 2010 The American Physical Society. Received 22 July 2010; published 15 December 2010. For particularly useful discussions we thank J. Biddle, L. Fallani, S. Rolston, I. Spielman, and B. Wu. We would like to acknowledge support from the Joint Quantum Institute Physics Frontier Center and the Sherman Fairchild Foundation (R.B.); and the Packard Foundation, Sloan Foundation, and the research corporation, as well as Darpa, and NSF Grants No. PHY-0456720 and No. PHY-0803371 (G.R.).
Funding AgencyGrant Number
Joint Quantum Institute of Physics Frontier CenterUNSPECIFIED
Sherman Fairchild FoundationUNSPECIFIED
Packard FoundationUNSPECIFIED
Sloan FoundationUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Issue or Number:22
Classification Code:PACS: 03.75.Hh, 03.75.Ss, 71.55.Jv
Record Number:CaltechAUTHORS:20110328-082217476
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Official Citation:Particle-hole symmetric localization in optical lattices using time modulated random on-site potentials Yue Zou, Ryan Barnett, and Gil Refael Published 15 December 2010 (7 pages) 224205
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23115
Deposited By: Ruth Sustaita
Deposited On:28 Mar 2011 20:17
Last Modified:09 Nov 2021 16:11

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