Speaker: 张聪博士，北师大      

Inviter: 吴小宁研究员

Title: Black holes and covariance in effective quantum gravity: A solution without Cauchy horizons

Language: Chinese 

Time & Venue: 2025.04.10  19:00-20:00  腾讯会议：145911918  会议密码：250410

Abstract: By solving effective loop quantum equation, a new Hamiltonian constraint is obtained, incorporating free functions that can account for quantum gravity effects. Specifying these functions allows for an analysis of the resulting spacetime structure. Remarkably, in this model, the classical singularity is replaced by a region where the metric asymptotically approaches a Schwarzschild-de Sitter one with negative mass. Unlike previously studied spacetime structures, this new quantum-corrected model avoids the presence of Cauchy horizons, potentially suggesting its stability under perturbations. Finally, the covariance of dust field coupling within the effective.