Collapse inhibition in three-dimensional Bose–Einstein condensates: Internal repulsion and particle loss

Michele Modugno and E. Ya. Sherman

Chaos, Solitons & Fractals, 2022, vol. 163, issue C

Abstract: We consider the dynamics of three-dimensional Bose–Einstein condensates of cold atoms in the presence of internal dynamical counter-pressure that may arise due to three-body atomic collisions. We demonstrate that, in the corresponding phenomenological approach, in addition to the condensate density losses, these three-body interactions may lead to an internal pressure resulting in a repulsive potential in the condensate. This repulsion, being nonlocal and expressed with a specific form of the integral dependence on the condensate density, similar to the manifestation of the Coulomb forces in charged systems, can determine the entire condensate evolution. We find that these effects can inhibit the collapse of a self-attracting condensate and even cause its explosion, and identify the corresponding conditions numerically.

Keywords: Bose–Einstein condensate; Collapse; Nonlinear quantum dynamics; Gross–Pitaevskii equation (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:163:y:2022:i:c:s096007792200707x

DOI: 10.1016/j.chaos.2022.112502

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