Ultracold dipolar gases in optical lattices

Year: 2011

Authors: Trefzger C., Menotti C., Capogrosso-Sansone B., Lewenstein M.

Autors Affiliation: ICFO Inst Ciencies Foton, Barcelona 08860, Spain; Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom Mol & Opt Phys, Cambridge, MA 02138 USA; ICREA, Barcelona 08010, Spain.

Abstract: This tutorial is a theoretical work, in which we study the physics of ultra-cold dipolar bosonic gases in optical lattices. Such gases consist of bosonic atoms or molecules that interact via dipolar forces, and that are cooled below the quantum degeneracy temperature, typically in the nK range. When such a degenerate quantum gas is loaded into an optical lattice produced by standing waves of laser light, new kinds of physical phenomena occur. Then, these systems realize extended Hubbard-type models, and can be brought to a strongly correlated regime. The physical properties of such gases, dominated by the long-range, anisotropic dipole-dipole interactions, are discussed using the mean-field approximations and exact quantum Monte Carlo techniques (the worm algorithm).

Journal/Review: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS

Volume: 44 (19)      Pages from: 193001-1  to: 193001-31

More Information: This tutorial was supported by Spanish MEC(FIS2008-00784, QOIT), EU projects AQUTE and NAMEQUAM, and ERC grant QUAGATUA. ML acknowledges also Alexander von Humboldt Stiftung and Hamburg Prize for Theoretical Physics. It is a great pleasure for us to thank everybody in the Quantum Optics Theory Group of ICFO for interesting discussions. We are especially grateful to K Rzazewski, who invited us to write this paper. CT thanks C Menotti, and M Lewenstein for their constant support, and patience, they showed him during these years, the result of which is not only in this work. CT thanks B Capogrosso-Sansone and G Pupillo for their guide in the quantum Monte Carlo work, and Peter Zoller for the kind hospitality in Innsbruck. This work was partially written at the Indian Association for the Cultivation of Science, in Calcutta, while CT was visiting K Sengupta. The warm hospitality he showed him is unique, and CT thanks him together with everybody in the Theoretical Physics Department.
KeyWords: Bose-einstein Condensate; State; Superfluid; Wave
DOI: 10.1088/0953-4075/44/19/193001

ImpactFactor: 1.875
Citations: 135
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