Thermodynamics and weak cosmic censorship conjecture in the Kerr-AdS black hole

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We investigate the laws of thermodynamics and weak cosmic censorship conjecture in the normal and extended phase space of a Kerr-AdS black hole by analyzing the energy-momentum relation of the absorbed fermion dropping into the horizon.

• In the normal phase space, the first law, second law as well as the weak cosmic censorship conjecture are found to be valid in all the initial states of the black hole.
• However, in the extended phase space, although the first law and weak cosmic censorship conjecture are still valid, the second law becomes more subtle.
• We find that the validity or violation of the second law depends on the spin parameter, the radius of the AdS spacetime, and their variations.