MG15 - Talk detail

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Abstract

Gravity being the manifestation of the curvature of spacetime can create regions which are inaccessible to a class of observers. An example of such a region is the event horizon of black objects which acts as a one-way causal boundary. Interestingly, it is possible to assign thermodynamic properties like temperature, entropy etc. to the event horizon. The basis of this thermodynamic analogy is the second law of black hole mechanics which asserts that the area of the event horizon can not decrease in any classical process. The general theory of relativity could be an effective theory and the classical action for gravity may also contain higher curvature terms. Then a natural question is whether the thermodynamic properties of space-time horizons can be generalized beyond general relativity. This talk will focus on the ``second law" of black hole thermodynamics and discuss various possible generalizations to higher curvature gravity and how the second law connects black hole entropy with the notion of holographic entanglement entropy in AdS/CFT.

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