Webinar

Black holes are thermodynamic objects, but they do not completely align with known standard thermodynamics. Besides the peculiar property of area dependence of black hole entropy, these objects are thermodynamically unstable at equilibrium, making a thermodynamic canonical ensemble description impossible. Thus, thermal instability is another peculiar property of black holes which needs attention. Motivated by the fact that any quantum gravity theory should not only recover the area law in the hydrodynamic limit but also explain different thermodynamic phases of black holes, we studied the phase transition properties of various black hole solutions at thermodynamic level. We considered black holes in different settings of the cosmological constant, both as a mere parameter and as a thermodynamic variable, and observed interesting phase transition behaviour.

The talk will primarily be based on the following research articles:

• P. C. W. Davies, Proc. R. Soc. Lond. A353499–521 (1977)

• Neeraj Kumar, Soham Sen, Sunandan Gangopadhyay, Phys. Rev. D 107, 046005 (2023)

• Neeraj Kumar, Soham Sen, Sunandan Gangopadhyay, Phys. Rev. D 106, 026005 (2022)

 • Neeraj Kumar, Sunandan Gangopadhyay, Gen Relativ Gravit 53, 35 (2021)

• David Kubizňák, R. B. Mann, J. High Energ. Phys. 2012, 33 (2012)

• Wan Cong, David Kubizňák, and Robert B. Mann, Phys. Rev. Lett. 127, 091301 (2021)