Out-of-equilibrium states and quasi-many-body localization in polar lattice gases

Year: 2015

Authors: Barbiero L., Menotti C., Recati A., Santos L.

Autors Affiliation: Univ Padua, Dipartimento Fis & Astron Galileo Galilei, I-35131 Padua, Italy; Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Tech Univ Munich, D-85748 Garching, Germany; Leibniz Univ Hannover, Inst Theoret Phys, DE-30167 Hannover, Germany.

Abstract: The absence of energy dissipation leads to an intriguing out-of-equilibrium dynamics for ultracold polar gases in optical lattices, characterized by the formation of dynamically bound on-site and inter-site clusters of two or more particles, and by an effective blockade repulsion. These effects combined with the controlled preparation of initial states available in cold-gas experiments can be employed to create interesting out-of-equilibrium states. These include quasiequilibrated effectively repulsive 1D gases for attractive dipolar interactions and dynamically bound crystals. Furthermore, nonequilibrium polar lattice gases can offer a promising scenario for the study of quasi-many-body localization in the absence of quenched disorder. This fascinating out-of-equilibrium dynamics for ultracold polar gases in optical lattices may be accessible in on-going experiments.

Journal/Review: PHYSICAL REVIEW B

Volume: 92 (18)      Pages from: 180406-1  to: 180406-5

More Information: We thank X. Deng, P. Naldesi, H. Weimer, and A. Zenesini for discussions. This work was supported by ERC (QGBE grant), Provincia Autonoma di Trento, Cariparo Foundation (Eccellenza Grant No. 11/12), Alexander von Humboldt foundation, MIUR (FIRB 2012, Grant No. RBFR12NLNA-002), cluster QUEST, and DFG Research Training Group 1729. L.B. thanks the CNR-INO BEC Center in Trento for CPU time. L.S. thanks the BEC Center in Trento for its hospitality.
KeyWords: Ultracold Gases; Optical Lattice; Quantum-systems; Molecules; Dynamics
DOI: 10.1103/PhysRevB.92.180406

Citations: 27
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