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Topological Flat Bands from Dipolar Spin Systems

Yao, N. Y. and Laumann, C. R. and Gorshkov, A. V. and Bennett, S. D. and Demler, E. and Zoller, P. and Lukin, M. D. (2012) Topological Flat Bands from Dipolar Spin Systems. Physical Review Letters, 109 (26). Art. No. 266804. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:20130201-101356859

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Abstract

We propose and analyze a physical system that naturally admits two-dimensional topological nearly flat bands. Our approach utilizes an array of three-level dipoles (effective S=1 spins) driven by inhomogeneous electromagnetic fields. The dipolar interactions produce arbitrary uniform background gauge fields for an effective collection of conserved hard-core bosons, namely, the dressed spin flips. These gauge fields result in topological band structures, whose band gap can be larger than the corresponding bandwidth. Exact diagonalization of the full interacting Hamiltonian at half-filling reveals the existence of superfluid, crystalline, and supersolid phases. An experimental realization using either ultracold polar molecules or spins in the solid state is considered.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.109.266804DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevLett.109.266804PublisherUNSPECIFIED
http://arxiv.org/abs/1207.4479arXivUNSPECIFIED
Additional Information:© 2012 American Physical Society. Received 18 July 2012; published 26 December 2012. We gratefully acknowledge conversations with A. Zhai, B. Lev, J. Preskill, J. Alicea, and N. Lindner. This work was supported, in part, by the NSF, DOE (FG02-97ER25308), CUA, DARPA, AFOSR MURI, NIST, Lawrence Golub Fellowship, Lee A. DuBridge Foundation, IQIM, and the Gordon and Betty Moore Foundation.
Group:IQIM, Institute for Quantum Information and Matter
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
Department of Energy (DOE)FG02-97ER25308
CUA UNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR) MURIUNSPECIFIED
NISTUNSPECIFIED
Lawrence Golub FellowshipUNSPECIFIED
Lee A. DuBridge FoundationUNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Classification Code:PACS: 73.43.Cd, 05.30.Jp, 37.10.Jk, 71.10.Fd
Record Number:CaltechAUTHORS:20130201-101356859
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130201-101356859
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36734
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:01 Feb 2013 22:21
Last Modified:01 Feb 2013 22:21

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