Dynamics of bloch matter waves and its breakdown: A Bose-Einstein condensate in a moving ID optical lattice
Authors: Fort C., Cataliotti F.S., Catani J., De Sarlo L., Fallani L., Lye J.E., Modugno M., Saers R., Inguscio M.
Autors Affiliation: LENS, Dipartimento Fisica, INFM Università Firenze, via Nello Carrara 1, I-50019 Sesto Fiorentino (FI), Italy; Dipartamento Fisica, Università Catania, via S. Sofia 64, I-95124 Catania, Italy; BEC-INFM Center, Università di Trento, I-38050 Povo (TN), Italy; Department of Physics, Umeå University, S-90187 Umeå, Sweden
Abstract: We present the results of experimental work on the dynamics of a Bose-Einstein condensate (BEC) loaded in a 1D moving optical lattice. The system is studied both in the regime of low atomic density (expanding BEC) and high atomic density (trapped BEC). In the low-density regime, the stable dynamics of the system is well-described in terms of Bloch waves. In the presence of nonlinearities, as in a high-density sample, the Bloch waves are not stable solutions of the Gross-Pitaevskii equation (GPE) and dynamical instability takes place.
Journal/Review: LASER PHYSICS
Volume: 15 (3) Pages from: 447 to: 453
KeyWords: Approximation theory; Condensation; Nonlinear optics; Phonons; Solitons; Solutions, Bose-Einstein condensate; Breakdown; Matter waves; Optical lattice, DynamicsCitations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-08-01References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here