Stochastic growth dynamics and composite defects in quenched immiscible binary condensates

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

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Article number023628
JournalPhysical Review A
Volume93
Issue number2
DOIs
Publication statusPublished - 2016 Feb 18

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condensates
composite materials
defects
shot
solitary waves
condensing
metastable state
emerging
histories
sensitivity
gases

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Liu, I. K., Pattinson, R. W., Billam, T. P., Gardiner, S. A., Cornish, S. L., Huang, T. M., ... Proukakis, N. P. (2016). Stochastic growth dynamics and composite defects in quenched immiscible binary condensates. Physical Review A, 93(2), [023628]. https://doi.org/10.1103/PhysRevA.93.023628
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. / Stochastic growth dynamics and composite defects in quenched immiscible binary condensates. In: Physical Review A. 2016 ; Vol. 93, No. 2.
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Liu, IK, Pattinson, RW, Billam, TP, Gardiner, SA, Cornish, SL, Huang, TM, Lin, WW, Gou, SC, Parker, NG & Proukakis, NP 2016, 'Stochastic growth dynamics and composite defects in quenched immiscible binary condensates', Physical Review A, vol. 93, no. 2, 023628. https://doi.org/10.1103/PhysRevA.93.023628

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.

In: Physical Review A, Vol. 93, No. 2, 023628, 18.02.2016.

Research output: Contribution to journalArticle

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Liu IK, Pattinson RW, Billam TP, Gardiner SA, Cornish SL, Huang TM et al. Stochastic growth dynamics and composite defects in quenched immiscible binary condensates. Physical Review A. 2016 Feb 18;93(2). 023628. https://doi.org/10.1103/PhysRevA.93.023628