English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Recently, a conjecture has been proposed, which indicates a correlationbetween super-entropy black holes and the thermodynamic instability\cite{Cong:2019bud}. W.Cong et al. suggested that the $C_{V}$ (specific heatcapacity at constant volume) and $C_{P}$ (specific heat capacity at constantpressure) of a super-entropy black hole could not be greater than zerosimultaneously as set in the extended phase space, which implies that the blackhole is unstable in extended thermodynamics. This conjecture is intriguing andmeaningful. Therefore, we did a study on that. After deriving the equations ofspecific heat capacities as well as plotting the relevant curves of thefour-dimensional conformal black holes (a kind of super-entropy black hole), weobtained regions on the graphs where $C_{V}$ and $C_{P}$ are simultaneouslygreater than zero, which contradicts the conjecture that super-entropy blackhole corresponds to its thermodynamic instability. Thus far, we have provided acounterexample to the hypothesis in \cite{Cong:2019bud}.

Thermodynamic Instabilities of Conformal Gravity Holography in Four Dimensions