The Extended Thermodynamic Phase Structure of Taub-NUT and Taub-Bolt
Clifford V. Johnson
TL;DR
This paper explores the phase structure of Taub-NUT and Taub-Bolt geometries in AdS spacetime within extended thermodynamics, revealing phase transitions and effects of dyonic deformations.
Contribution
It provides a detailed analysis of the phase diagram and thermodynamic behavior of Taub-NUT/Bolt solutions, including the impact of dyonic deformations.
Findings
Identified a line of first order phase transitions in the (p,T) plane.
Interpreted unstable negative specific heat regions dynamically.
Characterized the effects of dyonic deformations on phase structure.
Abstract
We study aspects of the extended gravitational thermodynamics for the Taub-NUT and Taub-Bolt geometries in four dimensional locally anti-de Sitter spacetime, where the cosmological constant is treated as a dynamical pressure. Attention is paid to the phase structure in the (p,T) plane, which has a line of first order phase transitions extending from the origin. We argue for a dynamical interpretation of the unstable physics in the negative specific heat region. A deformation corresponding to a dyonic Taub-NUT/Bolt system is also explored, and the effect of the deformation on the phase diagram is characterised.
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