Stable vortex structures in colliding self-gravitating Bose-Einstein condensates

Abstract

A key feature of ultra-light dark matter composed by bosons is the formation of superfluid Bose-Einstein condensate (BEC) structures on galactic scales. We study collisions of BEC solitonic and vortex structures in the framework of the Gross-Pitaevskii-Poisson model. It is found that the superfluid nature of bosonic dark matter leads to the formation of quantized vortex lines and vortex rings in interference patterns formed during collisions. Calculating the gravitational wave luminosity, we demonstrated that quantum interference patterns affect notably the gravitational wave radiation. We reveal that superfluid self-gravitating BECs can form stable localized vortex structures which remain robust even after a head-on collision.

9 pages, 8 figures

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• Dynamic instabilities and turbulence of merged rotating Bose-Einstein condensates
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• Dynamical friction in rotating ultralight dark matter galactic cores
• Collective Excitations of Self-Gravitating Bose-Einstein Condensates: Breathing Mode and Appearance of Anisotropy under Self-Gravity
• Comparison of two different integration methods for the (1+1)-Dimensional Schrödinger-Poisson Equation
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• Equilibrium Core and Vortex Solutions of Bose Einstein Condensate Dark Matter around a Black Hole
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• (1+1)-Dimensional Schrödinger-Poisson equation with contact interaction
• Vortex Retention Mediated Turbulent Transitions in Self-Gravitating Bosonic and Axionic Condensates
• Time-dependent adaptive mesh refinement solver for the Gross-Pitaevskii-Poisson equations