Theoretical Physics(DTP)
Physique théorique (DPT)

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Robert Bruce MANN
University of Waterloo

Mass Conjectures, Entropy Bounds and the dS/CFT Correspondence

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We consider the class of four-dimensional Taub-Bolt(NUT) spacetimes with positive cosmological constant and non-zero NUT charge. We show that such spacetimes can be thermodynamically stable and have entropies that are greater than that of de Sitter spacetime, in violation of the entropic N-bound conjecture. We also show that the maximal mass conjecture, which states "any asymptotically dS spacetime with mass greater than dS has a cosmological singularity", can be violated as well. Our calculation of conserved mass and entropy is based on an extension of the path integral formulation to asymptotically de Sitter spacetimes.

In collabaration with: R. Clarkson University of Waterloo,M. Ghezelbash University of Waterloo.