Observation of a modulational instability in Bose-Einstein condensates

P. J. Everitt; M. A. Sooriyabandara; M. Guasoni; P. B. Wigley; C. H. Wei; G. D. McDonald; K. S. Hardman; P. Manju; J. D. Close; C. C.N. Kuhn; S. S. Szigeti; Y. S. Kivshar; N. P. Robins

doi:10.1103/PhysRevA.96.041601

Observation of a modulational instability in Bose-Einstein condensates

P. J. Everitt, M. A. Sooriyabandara, M. Guasoni, P. B. Wigley, C. H. Wei, G. D. McDonald, K. S. Hardman, P. Manju, J. D. Close, C. C.N. Kuhn, S. S. Szigeti, Y. S. Kivshar, N. P. Robins

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78 Citations (Scopus)

Abstract

We observe the breakup dynamics of an elongated cloud of condensed Rb85 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.

Original language	English
Article number	041601
Journal	Physical Review A
Volume	96
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevA.96.041601
Publication status	Published - 6 Oct 2017

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title = "Observation of a modulational instability in Bose-Einstein condensates",

abstract = "We observe the breakup dynamics of an elongated cloud of condensed Rb85 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 Schr{\"o}dinger 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.",

author = "Everitt, {P. J.} and Sooriyabandara, {M. A.} and M. Guasoni and Wigley, {P. B.} and Wei, {C. H.} and McDonald, {G. D.} and Hardman, {K. S.} and P. Manju and Close, {J. D.} and Kuhn, {C. C.N.} and Szigeti, {S. S.} and Kivshar, {Y. S.} and Robins, {N. P.}",

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doi = "10.1103/PhysRevA.96.041601",

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AU - Everitt, P. J.

AU - Sooriyabandara, M. A.

AU - Guasoni, M.

AU - Wigley, P. B.

AU - Wei, C. H.

AU - McDonald, G. D.

AU - Hardman, K. S.

AU - Manju, P.

AU - Close, J. D.

AU - Kuhn, C. C.N.

AU - Szigeti, S. S.

AU - Kivshar, Y. S.

AU - Robins, N. P.

N1 - Publisher Copyright: © 2017 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license.

PY - 2017/10/6

Y1 - 2017/10/6

N2 - We observe the breakup dynamics of an elongated cloud of condensed Rb85 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.

AB - We observe the breakup dynamics of an elongated cloud of condensed Rb85 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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U2 - 10.1103/PhysRevA.96.041601

DO - 10.1103/PhysRevA.96.041601

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VL - 96

JO - Physical Review A

JF - Physical Review A

IS - 4

M1 - 041601

ER -

Observation of a modulational instability in Bose-Einstein condensates

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