Thermodynamically stable phases of asymptotically flat Lovelock black holes

Author:

Wu JerryORCID,Mann Robert BORCID

Abstract

AbstractWe present the first examples of phase transitions in asymptotically flat black hole solutions. We analyse the thermodynamic properties of black holes in orderN3Lovelock gravity, with zero cosmological constant. We find a new type of ‘inverted’ swallowtail indicative of stable temperature regions for an otherwise unstable neutral black hole, and demonstrate multiple such stable phases can exist and coexist at multi-critical points. We also find that for charged black holes, ordinary swallowtails can exist on the stable Gibbs free energy branch, allowing for multiple first order phase transitions as seen for anti-de Sitter (AdS) black holes. A triple point forN = 5 and a quadruple point forN = 7 are presented explicitly. We investigate changes in the Gibbs free energy as the lowest order Lovelock constant is varied, and draw comparisons to pressure changes for AdS black hole systems.

Funder

Perimeter Institute

University of Waterloo

Natural Sciences and Engineering Research Council of Canada

Publisher

IOP Publishing

Subject

Physics and Astronomy (miscellaneous)

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