چکیده

Black Hole (BH) thermodynamics has been pivotal to quantum gravity research. A pressing problem in this direction is to decipher the microscopic origin of Bekenstein-Hawking entropy. In particular, this takes us to us to the question: what happens to the thermodynamic behaviour as the BH size decreases due to Hawking evaporation? We investigate this problem by analyzing thermodynamic Ruppeiner geometry of higher dimensional Reissner-Nordström black holes (RNBHs) with Bekenstein-Hawking entropy modified by exponential contributions. Using a canonical ensemble approach, we discuss thermal stability of our BH and show how radically it changes for smaller sizes, while having no impact for large geometries. We find that these exponential corrections are a mixed blessing for the BH inasmuch as it either stabilizes or destablizes BH, depending on the scale of corrections and the choice of charge. The changes are manifested around extremal geometry where the BH mass and charge balance each other. Our findings stand in stark contrast to earlier observations that RNBHs are universally endowed with a flat Ruppeiner geometry.

کليدواژه ها

Black Hole thermodynamics, Bekenstein-Hawking Entropy, Quantum Gravity, Ruppeiner Geometry

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Masood Ahmad Shah Bukhari Syed , 1401 , Do higher dimenional Reissner-Nordström black holes possess a universal flat Ruppeiner geometry? , دومین کنفرانس بین المللی هولوگرافی و کاربردهای آن