期刊
PHYSICAL REVIEW A
卷 84, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.84.053627
关键词
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资金
- Madrid by Ministerio de Ciencia e Innovacion (MICINN) in Singapore [MAT2010-17180]
- National Research Foundation & Ministry of Education
- CEI Campus Moncloa
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Deutsche Forschungsgemeinschaft (DFG)
- Acciones Integradas of Deutscher Akademischer Auslandsdienst (DAAD)
- MICINN
We consider Bloch oscillations of Bose-Einstein condensates in the presence of a time-modulated s-wave scattering length. Generically, the interaction leads to dephasing and decay of the wave packet. Based on a cyclic-time argument, we find-in addition to the linear Bloch oscillation and a rigid soliton solution-an infinite family of modulations that lead to a periodic time evolution of the wave packet. In order to quantitatively describe the dynamics of Bloch oscillations in the presence of time-modulated interactions, we employ two complementary methods: collective coordinates and the linear stability analysis of an extended wave packet. We provide instructive examples and address the question of robustness against external perturbations.
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