主讲人：吴迪 西华师范大学

题目：Consistent mass formulas for the four-dimensional dyonic NUT-charged spacetimes

时间：2022年4月6日上午9:30

腾讯ID：685-777-515

联系人：王永强

报告摘要：

In our previous work [Phys. Rev. D.100, 101501(R) (2019)], a novel idea that the Newman-Unti-Tamburino(NUT) charge can be thought of as a thermodynamical multi-hair has been advocated to describe perfectly thethermodynamical character of the generic four-dimensional Taub-NUT spacetimes. According to this scheme,the Komar mass (M), the gravito-magnetic charge (N) and/or the dual (magnetic) mass, together with anew secondary hair(J_N=MN), that is, a Kerr-like conserved‘angular momentum’, enter into standard forms ofthe first law and Bekenstein-Smarr mass formulas. Distinct from other recent attempts, our consistent thermodynamicdifferential and integral mass formulas are both obtainable from a meaningful Christodoulou-Ruffini-typesquared mass formula of all four-dimensional NUT-charged spacetimes. As an excellent consequence, the famousBekenstein-Hawking one-quarter area-entropy relation can be naturally restored not only in the Lorentziansector and but also in the Euclidian one of generic Taub-NUT-type spacetimes without imposing any constraintcondition.

However, only purely electric-charged case in the four-dimensional Einstein-Maxwell gravity theory hasbeen addressed there. In thiswork, we shall follow the simple, systematic way proposed in that paper tofurther investigate the dyonic NUT-charged case. It is shown that the standard thermodynamic relations cancontinue to hold true by simply introducing two additional secondary hairs:Q_N= QNandP_N= PN, and theirthermodynamical conjugate potentials, withQandPbeing the electric and magnetic charges, respectively.

arXiv: 2202.09251, 1909.07776 [Phys. Rev. D.100, 101501(R) (2019)].

个人简介：

吴迪，西华师范大学讲师，理学博士，2021年6月博士毕业于湖南师范大学物理学专业，研究方向主要为广义相对论、黑洞物理。自2013年开始涉及科研以来，在黑洞隧穿辐射、ω-变形KK超引力理论中的黑洞解及其热力学、五维中性转动压扁黑洞、超旋转黑洞及含NUT荷黑洞热力学等方面研究课题均有探讨，已在学术期刊上发表论文14篇，其中JHEP1篇，Phys. Rev.D6篇(含快讯和快报各1篇)；《中国科学：物理学力学天文学》3篇；《科学通报》1篇等。