Observation of a modulational instability in Bose-Einstein condensates
Observation of a modulational instability in Bose-Einstein condensates
We observe the breakup dynamics of an elongated cloud of condensed Rb 85 atoms placed in an optical waveguide. The number of localized spatial components observed in the breakup is compared with the number of solitons predicted by a plane-wave stability analysis of the nonpolynomial nonlinear Schrödinger equation, an effective one-dimensional approximation of the Gross-Pitaevskii equation for cigar-shaped condensates. It is shown that the numbers predicted from the fastest growing sidebands are consistent with the experimental data, suggesting that modulational instability is the key underlying physical mechanism driving the breakup.
1-5
Everitt, P.J.
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Sooriyabandara, M.A.
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Guasoni, M.
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Wigley, P.B.
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Wei, C.H.
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McDonald, G. D.
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Hardman, K.S.
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Manju, P.
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Close, J.D.
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Kuhn, C.C.N.
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Szigeti, S.S.
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Kivshar, Y.S.
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Robins, N.P.
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6 October 2017
Everitt, P.J.
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Sooriyabandara, M.A.
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Guasoni, M.
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Wigley, P.B.
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Wei, C.H.
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McDonald, G. D.
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Hardman, K.S.
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Manju, P.
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Close, J.D.
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Kuhn, C.C.N.
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Szigeti, S.S.
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Kivshar, Y.S.
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Robins, N.P.
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Everitt, P.J., Sooriyabandara, M.A., Guasoni, M., Wigley, P.B., Wei, C.H., McDonald, G. D., Hardman, K.S., Manju, P., Close, J.D., Kuhn, C.C.N., Szigeti, S.S., Kivshar, Y.S. and Robins, N.P.
(2017)
Observation of a modulational instability in Bose-Einstein condensates.
Physical Review A, 96 (4), , [041601].
(doi:10.1103/PhysRevA.96.041601).
Abstract
We observe the breakup dynamics of an elongated cloud of condensed Rb 85 atoms placed in an optical waveguide. The number of localized spatial components observed in the breakup is compared with the number of solitons predicted by a plane-wave stability analysis of the nonpolynomial nonlinear Schrödinger equation, an effective one-dimensional approximation of the Gross-Pitaevskii equation for cigar-shaped condensates. It is shown that the numbers predicted from the fastest growing sidebands are consistent with the experimental data, suggesting that modulational instability is the key underlying physical mechanism driving the breakup.
Text
PhysRevA.96.041601
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More information
Accepted/In Press date: 1 June 2017
e-pub ahead of print date: 6 October 2017
Published date: 6 October 2017
Identifiers
Local EPrints ID: 431183
URI: http://eprints.soton.ac.uk/id/eprint/431183
ISSN: 2469-9926
PURE UUID: d5702f8f-bb80-4c41-9ebd-3836c1c3be19
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Date deposited: 24 May 2019 16:30
Last modified: 16 Mar 2024 01:56
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Contributors
Author:
P.J. Everitt
Author:
M.A. Sooriyabandara
Author:
P.B. Wigley
Author:
C.H. Wei
Author:
G. D. McDonald
Author:
K.S. Hardman
Author:
P. Manju
Author:
J.D. Close
Author:
C.C.N. Kuhn
Author:
S.S. Szigeti
Author:
Y.S. Kivshar
Author:
N.P. Robins
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