Self-gravitating bosons at nonzero temperature
Neven Bilic, Hrvoje Nikolic (Rudjer Boskovic Institute, Zagreb,, Croatia)
TL;DR
This paper investigates the behavior of self-gravitating charged bosons at finite temperature, identifying phase transitions and the formation of boson stars through numerical analysis of condensation.
Contribution
It introduces a general-relativistic model for charged bosons at finite temperature, determining the critical temperature for condensation and the resulting ground state configurations.
Findings
Existence of two phases: gas and condensate.
Critical temperature for condensation identified.
Formation of boson star ground states at low temperature.
Abstract
A system of charged bosons at finite temperature and chemical potential is studied in a general-relativistic framework. We assume that the boson fields interact only gravitationally. At sufficiently low temperature the system exists in two phases: the gas and the condensate. By studying the condensation process numerically we determine the critical temperature at which the condensate emerges. As the temperature decreases, the system eventually settles down in the ground state of a cold boson star.
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