Scientific Results

Ultracold dipolar gases in optical lattices

Year: 2011

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

Autors Affiliation: ICFO – Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain; CNR – Istituto Nazionale di Ottica, BEC Center and Dipartimento di Fisica, Universita\’ di Trento, 38123 Povo, Italy: Institute for Theoretical Atomic, Molecular and Optical Physics, Harvard-Smithsonian Center of Astrophysics, Cambridge, MA 02138, USA; ICREA -Instituci├│ Catalana de Recerca i Estudis Avan├žats, Lluis Companys 23, 08010 Barcelona, 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).


Volume: 44 (19)      Pages from: 193001  to: 193001

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.
DOI: 10.1088/0953-4075/44/19/193001

Citations: 73
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