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  Nonlinear resonant tunneling of Bose-Einstein condensates in tilted optical lattices

Rapedius, K., Elsen, C., Witthaut, D., & Wimberger, S. M. (2010). Nonlinear resonant tunneling of Bose-Einstein condensates in tilted optical lattices. Physical Review A, 82: 063601. doi:10.1103/PhysRevA.82.063601.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-1207-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-1208-B
Genre: Journal Article

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 Creators:
Rapedius, Kevin, Author
Elsen, Chistoffer, Author
Witthaut, Dirk1, Author              
Wimberger, Sandro Marcel, Author
Affiliations:
1Max Planck Research Group Network Dynamics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063295              

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 Abstract: We study the tunneling decay of a Bose-Einstein condensate from tilted optical lattices within the mean-field approximation. We introduce a method to calculate ground and excited resonance eigenstates of the Gross-Pitaevskii equation, based on a grid relaxation procedure with complex absorbing potentials. This algorithm works efficiently in a wide range of parameters where established methods fail. It allows us to study the effects of the nonlinearity in detail in the regime of resonant tunneling, where the decay rate is enhanced by resonant coupling to excited unstable states.

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Language(s): eng - English
 Dates: 2010-12-03
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 528924
DOI: 10.1103/PhysRevA.82.063601
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Title: Physical Review A
Source Genre: Journal
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Pages: - Volume / Issue: 82 Sequence Number: 063601 Start / End Page: - Identifier: -