Journal
PHYSICAL REVIEW A
Volume 93, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.93.023628
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Funding
- U.K. EPSRC [EP/K03250X/1, EP/K030558/1]
- Ministry of Science and Technology, Taiwan [103-2112-M-018-002-MY3]
- John Templeton Foundation via the Durham Emergence Project
- Engineering and Physical Sciences Research Council [EP/K03250X/1, EP/K030558/1, EP/H003363/1] Funding Source: researchfish
- EPSRC [EP/H003363/1, EP/K03250X/1, EP/K030558/1] Funding Source: UKRI
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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.
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