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Quantum magnetism with polar alkali-metal dimers

Gorshkov, Alexey V. and Manmana, Salvatore R. and Chen, Gang and Demler, Eugene and Lukin, Mikhail D. and Rey, Ana Maria (2011) Quantum magnetism with polar alkali-metal dimers. Physical Review A, 84 (3). Art. No. 033619. ISSN 1050-2947.

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We show that dipolar interactions between ultracold polar alkali-metal dimers in optical lattices can be used to realize a highly tunable generalization of the t-J model, which we refer to as the t-J-V-W model. The model features long-range spin-spin interactions J_z and J_⊥ of XXZ type, long-range density-density interaction V, and long-range density-spin interaction W, all of which can be controlled in both magnitude and sign independently of each other and of the tunneling t. The “spin” is encoded in the rotational degree of freedom of the molecules, while the interactions are controlled by applied static electric and continuous-wave microwave fields. Furthermore, we show that nuclear spins of the molecules can be used to implement an additional (orbital) degree of freedom that is coupled to the original rotational degree of freedom in a tunable way. The presented system is expected to exhibit exotic physics and to provide insights into strongly correlated phenomena in condensed-matter systems. Realistic experimental imperfections are discussed.

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Additional Information:© 2011 American Physical Society. Received 11 June 2011; published 15 September 2011. We thank Jun Ye, Peter Zoller, Jesus Aldegunde, Paul Julienne, Goulven Quéméner, Bernhard Wunsch, Andrew Potter, Alejandro Muramatsu, Alexander Moreno, Matthias Troyer, Mehrtash Babadi, Peter Rabl, Andrew Daley, and Hendrik Weimer for discussions. This work was supported by NSF (PFC and Grants No. PHY-0803371, No. PHY05-51164, No.PIF-0904017, and No. DMR-07-05472), the Lee A. DuBridge Foundation, ARO with funding from the DARPA OLE program, Harvard-MIT CUA, AFOSR Quantum Simulation MURI, and AFOSR MURI on Ultracold Molecules.
Group:Institute for Quantum Information and Matter, IQIM
Funding AgencyGrant Number
Lee A. DuBridge FoundationUNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Defense Advanced Research Projects Agency (DARPA) OLE programUNSPECIFIED
Air Force Office of Scientific Research (AFOSR) Quantum Simulation (MURI)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR) Multidisciplinary University Research Initiative (MURI)UNSPECIFIED
Classification Code:PACS: 67.85.-d, 71.10.Fd, 33.80.-b, 33.20.-t
Record Number:CaltechAUTHORS:20111004-121520377
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Official Citation:Quantum magnetism with polar alkali-metal dimers Alexey V. Gorshkov, Salvatore R. Manmana, Gang Chen, Eugene Demler, Mikhail D. Lukin, and Ana Maria Rey Published 15 September 2011 (23 pages) 033619
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25638
Deposited By: Ruth Sustaita
Deposited On:04 Oct 2011 20:03
Last Modified:26 Dec 2012 13:45

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