Singularity at the demise of a black hole

Justin Feng^1*, Shinji Mukohyama^2,3, Sante Carloni^4,5,6

¹Physics, LeCosPA, National Taiwan University, Taipei, Taiwan
²YITP, Kyoto University, Kyoto, Japan
³IPMU, The University of Tokyo, Kashiwa, Chiba, Japan
⁴Institute of Theoretical Physics, Charles University, Prague, Czech Republic
⁵DIME, Universita di Genova, Genova, Italy
⁶INFN Sezione di Genova, Genova, Italy

* Presenter:Justin Feng, email:jcfeng@ntu.edu.tw

We consider a class of quasiregular singularities characterized by points possessing two future-directed light cones and two past-directed light cones. Such singularities appear in the 1+1 trousers spacetime and the Deutsch-Politzer spacetime. We argue that these singularities are relevant for describing the endpoint of an evaporating black hole, and show that a class of emergent Lorentz signature theories can provide a microscopic description for these singularities.

Keywords: singularities, black hole evaporation, topology change, modified gravity, quantum gravity