报告人：吕宏教授，天津大学理学院物理系量子交叉研究中心
邀请人：陈斌教授
报告时间：2025年8月29日（周五），10:00
报告地点：龙赛理科楼南楼414会议室

报告人简介：
吕宏，1994年在美国德州农工大学获得理论物理博士学位。目前就职于天津大学理学院物理系量子交叉研究中心，任讲席教授。他长期从事超弦、超引力及爱因斯坦引力的研究，专注于包含黑洞在内的多种课题。根据hep-inspire数据，他已经发表300篇以上SCI论文，总他引超过14000，H指数63。

报告摘要：
We consider Einstein gravity minimally coupled to two Maxwell fields and one dilaton scalar. We study the electrically-charged spherically-symmetric and static solutions that are asymptotic to Minkowski spacetime. General solutions are described by four independent parameters: mass M, two electric charges (Q₁, Q₂) and the scalar charge Σ. For black holes, the scalar charge is not independent, but a function of (M, Q₁, Q₂). We provide a set of formulae relating the mass to the charges, which allows us to determine Σ(M, Q₁, Q₂) without having to solve the black hole equations. Our results confirm the weaker version of the no-hair theorem conjecture: scalars can be turned on in a black hole, but they do not have continuous independent hairy parameters.

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