Entropic N-bound and maximal mass conjecture violations in four-dimensional Taub-Bolt(NUT)-dS spacetimes

2003/07/31 by R. Clarkson, R Clarkson, A. M. Ghezelbash +2 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #gr-qc #hep-th

paper · pdf · doi:10.1016/j.nuclphysb.2003.09.039

published as Nucl.Phys. B674 (2003) 329-364 · 37 pages, 22 figures, 3 tables, few typos corrected, version to appear in Nucl. Phys. B

openalex publication_date 2003/10/16 · arxiv created 2003/10/31 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We show that the class of four-dimensional Taub-Bolt(NUT) spacetimes with positive cosmological constant for some values of NUT charges are 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.

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