Searcharxiv⌕ Search

arXiv subjects

Victor Loiko

Publications and source records attributed to Victor Loiko.

2 recordsLinked to original sources
arXiv2024

Hairy dyonic Reissner-Nordstr\"om black holes in an Einstein-Maxwell-Friedberg-Lee-Sirlin type model

We construct spherically symmetric dyonic black holes in a generalized Maxwell-Friedberg-Lee-Sirlin type model with a complex scalar doublet and a symmetry breaking potential {for the real scalar field}, minimally coupled to Einstein gravity in asymptotically flat space. We analyze the properties of the hairy black holes and determine their domain of existence. Our discussion focuses mostly on the case of a long-ranged massless real scalar field. Our results indicate that in this case, depending on the coupling constants, the resonant hairy dyonic black holes may bifurcate from Reissner-Nordstr\"om black holes at maximal chemical potential, while the limiting solutions at minimal chemical potential may be related to the Penney solution.

hep-th↗
arXiv2022

Q-ball stress stability criterion in the $U(1)$ gauged scalar theories

We study the canonical energy-momentum tensor of the spherically symmetric $U(1)$ gauged Q-ball configurations in the two-component Fridberg-Lee-Sirlin-Maxwell model, and in the one-component scalar model with a sixtic potential. We evaluate the distributions of the corresponding shear forces and pressure and study the stability criteria for these solutions. It is shown that the electrostatic repulsion may destabilize the $U(1)$ gauged Q-balls. However, in the limiting case of the Fridberg-Lee-Sirlin-Maxwell model with a long ranged real scalar component, the gauged Q-balls always remain stable.

hep-th↗