Consistent mass formulas for higher even-dimensional Taub-NUT spacetimes and their AdS counterparts
【Abstract】 Currently, there is a great deal of interest in the seeking of consistent thermodynamics of the Lorentzian Taub-Newman-Unti-Tamburino (NUT) spacetimes. Despite a lot of “satisfactory” efforts that have been made, all of these activities have been restricted to the four-dimensional cases, with the higher even-dimensional cases remaining unexplored. The aim of this article is to fill the gap for the first time. To the end of this subject, we first adopt our own idea that “The NUT charge is a thermodynamical multi-hair” to investigate the consistent thermodynamics of D=6, 8, 10 Lorentzian Taub-NUT spacetimes without a cosmological constant. Similarly to the D=4 cases, as in our previous works, we find that the first law and Bekenstein-Smarr mass formulas are perfectly satisfied if we still assign the secondary hair Jn=Mn as a conserved charge in both mass formulas. Turning to the cases with a nonzero cosmological constant, our treatment continues to work very well and all the results can be fairly generalized to the corresponding Taub-NUT anti–de Sitter spacetimes in higher even dimensions, although we do not know how to define and introduce a similar higher-dimensional version of the dual (magnetic) mass that is well known in four dimensions. Based upon the preceding results, we will also derive the reduced version of the mass formulas when the secondary hair Jn is viewed as a redundant thermodynamic variable.
【Author】 Di Wu (吴迪, Shuang-Qing Wu (吴双清
【Journal】 Physical Review D(IF：4.4) Time：2023-09-20