Jul 5 – 10, 2021
Europe/Rome timezone

Microscopic model building for Black Hole Membranes from Constraints of Symmetry

Jul 6, 2021, 7:30 AM
Talk in the parallel session Black hole thermodynamics Black Hole Thermodynamics


Swastik Bhattacharya (BITS Pilani Hyderabad)


Einstein equations projected on Black Hole horizons give rise to the equations of motion of a viscous fluid. This suggests a way to understand the microscopic degrees of freedom on the Black Holehorizon by focusing on the physics of this fluid. In this talk, we shall approach this problem by building a crude microscopic model for the Horizon-fluid(HF) corresponding to asymptotically flat Black Holes in 3+1 dimensions. The symmetry requirement for our model is that it should directly incorporate the S1 diffeo-symmetry on the BH horizon. The second constraint comes from the demand that the correct value of the Coefficient of the Bulk Viscosity of the HF can be deduced from the model. Both these requirements can be satisfied by an adoption of the eight vertex Baxter model on a S2 surface. We show that the adiabatic entropy quantisation proposed by Bekenstein also follows from this model. Finally, we argue the results obtained so far suggest that a perturbed Black Hole can be described by a CFT perturbed by relevant operators and discuss the physical implications.

Primary author

Swastik Bhattacharya (BITS Pilani Hyderabad)


Prof. S Shankaranarayanan (IIT Bombay)

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