标题： 熵乘积函数和NUT几何中的中心电荷 显示英文标题

标题： Entropy Product Function and Central charges in NUT Geometry

摘要： We define an \emph{熵乘积函数}~(EPF) for Taub-Newman-Unti-Tamburino~(TNUT) black hole~(BH) following the prescription suggested by Wu et al.~\cite{wu} ~[PRD 100, 101501(R) (2019)]. The prescription argues that a generic four-dimensional TNUT spacetime might be expressed in terms of three or four different types of thermodynamic hairs. They can be defined as the Komar mass~($M=m$), the angular momentum~($J_{n}=mn$), the gravitomagnetic charge ($N=n$), the dual~(magnetic) mass $(\tilde{M}=n)$. Taking this prescription and using the \emph{EPF}, we derive the \emph{中心荷} of dual CFT~(conformal field theory) via Cardy's formula. Remarkably, we \emph{找到} that for TNUT BH there exists a relation between the \emph{中心电荷和EPF} as $c=6\left(\frac{\partial {\cal F}}{\partial {\cal N}_{i}}\right)$, where ${\cal F}$ is EPF and ${\cal N}_{i}$ is one of the integer-valued charges i.e. NUT电荷~($N$)或任何新的守恒电荷~($J_{N}$)。 我们通过计算不同热力学参数的精确值来重新验证这些结果。 我们从两个视界的热力学第一定律定义EPF~${\cal F}$。 此外，我们分别写出左行和右行区间的两个视界的热力学第一定律。 引入Bézout恒等式，我们表明对于TNUT黑洞，可以生成由一对整数$(a,b)$描述的更多全息描述。 更多的全息图像在理解量子引力的全息性质方面具有重要意义。 此外，使用\emph{EPF}，我们推导出Reissner-Nordström-NUT~(RNNUT)黑洞、Kerr-Taub-NUT~(KNUT)黑洞和Kerr-Newman-NUT~(KNNUT)黑洞的中心电荷。 最后，我们证明了只要EPF是质量无关的~(或普遍的)，它们在两个区间内相等。 显示英文摘要

摘要： We define an \emph{entropy product function}~(EPF) for Taub-Newman-Unti-Tamburino~(TNUT) black hole~(BH) following the prescription suggested by Wu et al.~\cite{wu} ~[PRD 100, 101501(R) (2019)]. The prescription argues that a generic four-dimensional TNUT spacetime might be expressed in terms of three or four different types of thermodynamic hairs. They can be defined as the Komar mass~($M=m$), the angular momentum~($J_{n}=mn$), the gravitomagnetic charge ($N=n$), the dual~(magnetic) mass $(\tilde{M}=n)$. Taking this prescription and using the \emph{EPF}, we derive the \emph{central charges} of dual CFT~(conformal field theory) via Cardy's formula. Remarkably, we \emph{find} that for TNUT BH there exists a relation between the \emph{central charges and EPF} as $c=6\left(\frac{\partial {\cal F}}{\partial {\cal N}_{i}}\right)$, where ${\cal F}$ is EPF and ${\cal N}_{i}$ is one of the integer-valued charges i.e. the NUT charges~($N$) or any new conserved charges~($J_{N}$). We reverify these results by calculating the exact values of different thermodynamic parameters. We define the EPF~${\cal F}$ from the first law of thermodynamics of both horizons. Moreover, we write the first laws of both the horizons for left-moving and right-moving sectors. Introducing the B\'{e}zout's identity, we show that for TNUT BH one can generate more holographic descriptions described by a pair of integers $(a,b)$. More holographic pictures have a great significance in understanding the holographic nature of quantum gravity. Furthermore, using the \emph{EPF} we derive the central charges for Reissner-Nordstr\"{o}m-NUT~(RNNUT) BH, Kerr-Taub-NUT~(KNUT) BH and Kerr-Newman-NUT~(KNNUT) BH. Finally, we prove that they are equal in both sectors provided that the EPF is mass-independent~(or universal).