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Nonlinear resonances in delta-kicked Bose-Einstein condensates

Nonlinear resonances in delta-kicked Bose-Einstein condensates
Nonlinear resonances in delta-kicked Bose-Einstein condensates
We investigate the effect of atomic interactions on ?-kicked cold atoms. We show that the clearest signature of the nonlinear dynamics is a surprisingly abrupt cutoff that appears on the leading resonances. We show that this is due to an excitation path combining both Beliaev and Landau processes, with some analogies to nonlinear self-trapping. Investigation of dynamical instability reveals further symptoms of nonlinearity such as a regime of exponential oscillations.
0031-9007
014102-[4pp.]
Monteiro, T.S.
e57548f7-6148-4ccd-abcd-2761fadf111f
Rançon, A.
5d2e7f58-157f-4e21-9691-007de911211f
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Monteiro, T.S.
e57548f7-6148-4ccd-abcd-2761fadf111f
Rançon, A.
5d2e7f58-157f-4e21-9691-007de911211f
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4

Monteiro, T.S., Rançon, A. and Ruostekoski, J. (2009) Nonlinear resonances in delta-kicked Bose-Einstein condensates. Physical Review Letters, 102 (1), 014102-[4pp.]. (doi:10.1103/PhysRevLett.102.014102).

Record type: Article

Abstract

We investigate the effect of atomic interactions on ?-kicked cold atoms. We show that the clearest signature of the nonlinear dynamics is a surprisingly abrupt cutoff that appears on the leading resonances. We show that this is due to an excitation path combining both Beliaev and Landau processes, with some analogies to nonlinear self-trapping. Investigation of dynamical instability reveals further symptoms of nonlinearity such as a regime of exponential oscillations.

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Published date: 8 January 2009

Identifiers

Local EPrints ID: 64849
URI: http://eprints.soton.ac.uk/id/eprint/64849
ISSN: 0031-9007
PURE UUID: 9afbc6c0-baa7-49a3-8e58-8e5d13db64d2

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Date deposited: 19 Jan 2009
Last modified: 09 Nov 2021 10:24

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Contributors

Author: T.S. Monteiro
Author: A. Rançon
Author: J. Ruostekoski

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