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oai:docta.ucm.es:20.500.14352/348452024-09-03T15:20:49Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Creffield, Charles author Sols Lucía, Fernando author Ciampini, D. author Morsch, O. author Arimondo, E. author 2014-01-27 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. 1050-2947 10.1103/PhysRevA.82.035601 https://hdl.handle.net/20.500.14352/34845 http://dx.doi.org/10.1103/PhysRevA.82.035601 http://journals.aps.org Expansion of matter waves in static and driven periodic potentials