Thermodynamic Topology and Phase Space Analysis of AdS Black Holes Through Non-Extensive Entropy Perspectives

Abstract

This paper studies the thermodynamic topology through the bulk-boundary and restricted phase space (RPS) frameworks. In bulk-boundary framework, we observe two topological charges $(\omega =+1,-1)$ concerning the non-extensive Barrow parameter and with ($\delta =0$) in Bekenstein-Hawking entropy. For Renyi entropy, different topological charges are observed depending on the value of the $\lambda$ with a notable transition from three topological charges $(\omega =+1,-1,+1)$ to a single topological charge $(\omega =+1)$ as $\lambda$ increases. Also, by setting $\lambda$ to zero results in two topological charges $(\omega =+1,-1)$. Sharma-Mittal entropy exhibits three distinct ranges of topological charges influenced by the $\alpha$ and $\beta$ with different classifications viz $\beta$ exceeds $\alpha$, we will have $(\omega =+1,-1,+1)$, $\beta =\alpha$, we have $(\omega =+1,-1)$ and for $\alpha$ exceeds $\beta$ we face $(\omega =-1)$. Also, Kaniadakis entropy shows variations in topological charges viz we observe $(\omega =+1,-1)$ for any acceptable value of $K$, except when $K=0$, where a single topological charge $(\omega =-1)$. In the case of Tsallis-Cirto entropy, for small parameter $\Delta$ values, we have $(\omega =+1)$ and when $\Delta$ increases to 0.9, we will have $(\omega =+1,-1)$. When we extend our analysis to the RPS framework, we find that the topological charge consistently remains $(\omega =+1)$ independent of the specific values of the free parameters for Renyi, Sharma-Mittal, and Tsallis-Cirto. Additionally, for Barrow entropy in RPS, the number of topological charges rises when $\delta$ increases from 0 to 0.8. Finally for Kaniadakis entropy, at small values of $K$, we observe $(\omega =+1)$. However, as the non-extensive parameter $K$ increases, we encounter different topological charges and classifications with $(\omega =+1,-1)$.

18 pages, 10 figures

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