Scientific Results

Expansion of matter waves in static and driven periodic potentials

Year: 2010

Authors: Creffield C.E., Sols F., Ciampini D., Morsch O., Arimondo E.

Autors Affiliation: CNISM-Pisa, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, I-56127 Pisa, Italy;
CNR РIstituto Nazionale di Ottica, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3, I-56127 Pisa, Italy

Abstract: We study the nonequilibrium dynamics of cold atoms held in an optical lattice subjected to a periodic driving potential. The expansion of an initially confined atom cloud occurs in two phases: an initial quadratic expansion followed by a ballistic behavior at long times. Accounting for this gives a good description of recent experimental results and provides a robust method to extract the effective intersite tunneling from time-of-flight measurements.


Volume: 82 (3)      Pages from: 035601  to: 035601

More Information: This research was supported by the Accion Integrada/Azioni Integrate scheme (Spain/Italy). The authors also acknowledge support from the Spanish MICINN through Grant No. FIS-2007-65723 and the Ramon y Cajal program (CEC). We thank H. Lignier, C. Sias, Y. Singh, and A. Zenesini for assistance with the experiments.
DOI: 10.1103/PhysRevA.82.035601

Citations: 27
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