Park, I.Y. Black Hole Entropy from Non-Dirichlet Sectors, and a Bounce Solution. Foundations of Physics 2023, 53, doi:10.1007/s10701-023-00719-5.
Park, I.Y. Black Hole Entropy from Non-Dirichlet Sectors, and a Bounce Solution. Foundations of Physics 2023, 53, doi:10.1007/s10701-023-00719-5.
Park, I.Y. Black Hole Entropy from Non-Dirichlet Sectors, and a Bounce Solution. Foundations of Physics 2023, 53, doi:10.1007/s10701-023-00719-5.
Park, I.Y. Black Hole Entropy from Non-Dirichlet Sectors, and a Bounce Solution. Foundations of Physics 2023, 53, doi:10.1007/s10701-023-00719-5.
Abstract
In a series of recent works the relevance of gravitational boundary degrees of freedom and their dynamics in gravity quantization and black hole information has been explored. In this work we further the progress by keenly focusing on the boundary degrees of freedom as the origin of black hole entropy. Wald's entropy formula is scrutinized, and the reason that the Wald's formula correctly captures the entropy of a black hole is examined. Afterwards, limitations of the Wald's method are discussed; a coherent view of entropy based on boundary dynamics is presented. The discrepancy observed in the literature between holographic and Wald's entropies is addressed. We generalize the entropy definition so as to handle a time-dependent black hole. Large gauge symmetry plays a pivotal role. Non-Dirichlet boundary conditions and gravitational analogues of Coleman-De Luccia bounce solutions are central in identifying the microstates and differentiating the origins of entropies associated with different classes of solutions. The result in the present work leads to a view that black hole entropy is entanglement entropy in a thermodynamic setup.
Keywords
black hole entropy; non-Dirichlet boundary condition; bounce
Subject
Physical Sciences, Acoustics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
