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Observation of a modulational instability in Bose-Einstein condensates

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.
2469-9926
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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Everitt, P.J.
de7564bb-9253-425d-a9ae-85512a9a3502
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), 1-5, [041601]. (doi:10.1103/PhysRevA.96.041601).

Record type: Article

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.

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PhysRevA.96.041601 - Version of Record
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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: 09 Jan 2022 09:00

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Contributors

Author: P.J. Everitt
Author: M.A. Sooriyabandara
Author: M. Guasoni
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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