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  Avalanches of Bose–Einstein condensates in leaking optical lattices

Ng, G. S., Hennig, H., Fleischmann, R., Kottos, T., & Geisel, T. (2009). Avalanches of Bose–Einstein condensates in leaking optical lattices. New Journal of Physics, 11: 073045. doi:10.1088/1367-2630/11/7/073045.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C972-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C973-1
Genre: Journal Article

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Ng, G. S., Author
Hennig, Holger1, Author              
Fleischmann, Ragnar1, Author              
Kottos, Tsampikos1, Author              
Geisel, Theo1, Author              
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1Department of Nonlinear Dynamics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063286              

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 Abstract: We study the decay of an atomic Bose–Einstein condensate (BEC) population N(τ) from the leaking boundaries of an optical lattice (OL). For a rescaled interatomic interaction strength Λ>Λb, discrete breathers (DBs) are created that prevent the atoms from reaching the leaking boundaries. Collisions of other lattice excitations with the outermost DBs result in avalanches, i.e. steps in N(τ), which for a whole range of Λ-values follow a scale-free distribution P(J=δN)~1/Jα. A theoretical analysis of the mixed phase space of the system indicates that 1<α<3, in agreement with our numerical findings

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Language(s): eng - English
 Dates: 2009-07-23
 Publication Status: Published online
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1088/1367-2630/11/7/073045
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Title: New Journal of Physics
Source Genre: Journal
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Pages: 14 Volume / Issue: 11 Sequence Number: 073045 Start / End Page: - Identifier: -