Low Temperature Physics: 47, 89 (2021); https://doi.org/10.1063/10.0003166
Fizika Nizkikh Temperatur: Volume 47, Number 2 (February 2021), p. 103-109    ( to contents , go back )

Superfluid stars and Q-balls in curved spacetime

K. G. Zloshchastiev

Institute of Systems Science, Durban University of Technology, Durban 4000, South Africa
E-mail: k.g.zloschastiev@gmail.com; kostiantynz@dut.ac.za
pos Анотація:672

Received September 3, 2020, published online December 25, 2020

Abstract

Within the framework of the theory of strongly-interacting quantum Bose liquids, we consider a general relativistic model of self-interacting complex scalar fields with logarithmic nonlinearity taken from dense superfluid models. We demonstrate the existence of gravitational equilibria in this model, described by spherically symmetric nonsingular finite-mass asymptotically-flat solutions. These equilibrium configurations can describe both massive astronomical objects, such as bosonized superfluid stars or cores of neutron stars, and finite-size particles and non-topological solitons, such as Q-balls. We give an estimate for masses and sizes of such objects.

Key words: quantum Bose liquid, superfluidity in cold stars, Q-ball, logarithmic scalar gravity.

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