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Removal of excitations of Bose-Einstein condensates by space- and time-modulated potentials Staliunas, Kestutis Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers Àrees temàtiques de la UPC::Física::Mecànica quàntica Bose-Einstein condensation -- Mathematical models. BEC's Condensat de Bose-Einstein We propose that periodically in space- and time-modulated potentials (dynamic lattices) can efficiently remove the excited (the high-energy and large momentum) components of the trapped Bose-Einstein condensates (BECs) and, consequently, can result in efficient cleaning of the BECs. We prove the idea by numerically solving the mean-field models (the Schrödinger equation for noninteracting condensates and the Gross-Pitaevskii equation for interacting condensates of repulsive atoms), and we evaluate parameters and conditions for the efficient removal of excitations. Peer Reviewed Postprint (published version) 2011-07-29 Article Staliunas, K. Removal of excitations of Bose-Einstein condensates by space- and time-modulated potentials. "Physical review A", 29 Juliol 2011, vol. 84, núm. 1, p. 1-5. 1050-2947 https://hdl.handle.net/2117/13295 10.1103/PhysRevA.84.013626 eng http://pra.aps.org/abstract/PRA/v84/i1/e013626 Open Access 5 p. application/pdf