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Tunable Superfluidity and Quantum Magnetism with Ultracold Polar Molecules

Gorshkov, Alexey V. and Manmana, Salvatore R. and Chen, Gang and Ye, Jun and Demler, Eugene and Lukin, Mikhail D. and Rey, Ana Maria (2011) Tunable Superfluidity and Quantum Magnetism with Ultracold Polar Molecules. Physical Review Letters, 107 (11). p. 115301. ISSN 0031-9007. doi:10.1103/PhysRevLett.107.115301.

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By selecting two dressed rotational states of ultracold polar molecules in an optical lattice, we obtain a highly tunable generalization of the t-J model, which we refer to as the t-J-V-W model. In addition to XXZ spin exchange, the model features density-density interactions and density-spin interactions; all interactions are dipolar. We show that full control of all interaction parameters in both magnitude and sign can be achieved independently of each other and of the tunneling. As a first step towards demonstrating the potential of the system, we apply the density matrix renormalization group method to obtain the 1D phase diagram of the simplest experimentally realizable case. Specifically, we show that the tunability and the long-range nature of the interactions in the t-J-V-W model enable enhanced superfluidity. Finally, we show that Bloch oscillations in a tilted lattice can be used to probe the phase diagram experimentally.

Item Type:Article
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Lukin, Mikhail D.0000-0002-8658-1007
Additional Information:© 2011 American Physical Society. Received 9 June 2011; published 8 September 2011. We thank A. Muramatsu, M. Troyer, A. Moreno, D. Jin, G. Refael, J. Aldegunde, P. Julienne, M. Babadi, I. Bloch, P. Rabl, G. Quéméner, A. Potter, B. Wunsch, P. Zoller, S. Pielawa, E. Berg, A. Daley, F. Mila, R. Noack, and H. Weimer for discussions. This work was supported by the NSF, NIST, the Lee A. DuBridge Foundation, the ARO with funding from DARPA-OLE, CUA, and AFOSR MURI. We acknowledge CPU time at ARSC.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Lee A. DuBridge FoundationUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)-OLEUNSPECIFIED
Army Research Office (ARO)/Center for Ultracold Atoms (CUA)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)/Multidisciplinary University Research Initiative (MURI)UNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Issue or Number:11
Classification Code:PACS: 67.85.-d, 33.80.-b, 71.10.Fd, 71.10.Pm
Record Number:CaltechAUTHORS:20110929-105922346
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25492
Deposited On:04 Oct 2011 17:18
Last Modified:09 Nov 2021 16:33

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