Stable vortex in Bose-Einstein condensate dark matter

Low Temperature Physics, vol. 47, pp. 684–692

Abstract

The nature of dark matter (DM) is one of the most fascinating unresolved challenges of modern physics. One of the perspective hypotheses suggests that DM consists of ultralight bosonic particles in the state of Bose–Einstein condensate (BEC). The superfluid nature of BEC must dramatically affect the properties of DM including quantization of the angular momentum. Angular momentum quantum in the form of a vortex line is expected to produce a considerable impact on the luminous matter in galaxies including density distribution and rotation curves. We investigate the evolution of spinning DM cloud with typical galactic halo mass and radius. Analytically and numerically stationary vortex soliton states with different topological charges have been analyzed. It has been shown that while all multi-charged vortex states are unstable, a single-charged vortex soliton is extremely robust and survives during the lifetime of the Universe.

Authors 5

1. Y. O. Nikolaieva

   Taras Shevchenko National University of Kyiv

   Affiliation as printed

   Department of Physics, Taras Shevchenko National University of Kyiv 1 , Kyiv 01601, Ukraine

2. A. O. Olashyn Aachen Instituut-Lorentz

   Leiden University · Taras Shevchenko National University of Kyiv

   Affiliation as printed

   Department of Physics, Taras Shevchenko National University of Kyiv 1 , Kyiv 01601, Ukraine

   Instituut-Lorentz, Universiteit Leiden 2 , Leiden 2300 RA, The Netherlands

3. Yevhenii Kuriatnikov

   TU Wien · Taras Shevchenko National University of Kyiv

   Affiliation as printed

   Atominstitut, TU Wien 3 , Vienna 1020, Austria

   Department of Physics, Taras Shevchenko National University of Kyiv 1 , Kyiv 01601, Ukraine

4. S. I. Vilchynskii corresponding

   Taras Shevchenko National University of Kyiv · École Polytechnique Fédérale de Lausanne

   Affiliation as printed

   Department of Physics, Taras Shevchenko National University of Kyiv 1 , Kyiv 01601, Ukraine

   Institute of Physics, Laboratory for Particle Physics and Cosmology (LPPC) 4 , École Polytechnique Federale de Lausanne (EPFL), Lausanne CH-1015, Switzerland

5. A. I. Yakimenko

   Taras Shevchenko National University of Kyiv

   Affiliation as printed

   Department of Physics, Taras Shevchenko National University of Kyiv 1 , Kyiv 01601, Ukraine