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Stochastic growth dynamics and composite defects in quenched immiscible binary condensates

Liu, I.-K.; Pattinson, R.W.; Billam, T.P.; Gardiner, S.A.; Cornish, S.L.; Huang, T.-M.; Lin, W.-W.; Gou, S.-C.; Parker, N.G.; Proukakis, N.P.

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Authors

I.-K. Liu

R.W. Pattinson

T.P. Billam

T.-M. Huang

W.-W. Lin

S.-C. Gou

N.G. Parker

N.P. Proukakis



Abstract

We study the sensitivity of coupled condensate formation dynamics on the history of initial stochastic domain formation in the context of instantaneously quenched elongated harmonically trapped immiscible two-component atomic Bose gases. The spontaneous generation of defects in the fastest condensing component, and subsequent coarse-graining dynamics, can lead to a deep oscillating microtrap into which the other component condenses, thereby establishing a long-lived composite defect in the form of a dark-bright solitary wave. We numerically map out diverse key aspects of these competing growth dynamics, focusing on the role of shot-to-shot fluctuations and global parameter changes (initial state choices, quench parameters, and condensate growth rates), with our findings also qualitatively confirmed by realistic finite-duration quenches. We conclude that phase-separated structures observable on experimental time scales are likely to be metastable states whose form is influenced by the stability and dynamics of the spontaneously emerging dark-bright solitary wave.

Citation

Liu, I., Pattinson, R., Billam, T., Gardiner, S., Cornish, S., Huang, T., …Proukakis, N. (2016). Stochastic growth dynamics and composite defects in quenched immiscible binary condensates. Physical Review A, 93(2), Article 023628. https://doi.org/10.1103/physreva.93.023628

Journal Article Type Article
Acceptance Date Dec 28, 2015
Online Publication Date Feb 18, 2016
Publication Date Feb 18, 2016
Deposit Date Feb 19, 2016
Publicly Available Date Feb 23, 2016
Journal Physical Review A
Print ISSN 1050-2947
Electronic ISSN 1094-1622
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 93
Issue 2
Article Number 023628
DOI https://doi.org/10.1103/physreva.93.023628
Related Public URLs http://arxiv.org/abs/1408.0891

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Copyright Statement
Published by the American Physical Society under the terms of the<br /> Creative Commons Attribution 3.0 License. Further distribution of<br /> this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.







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