Constraining Couplings of End-of-the-World Branes

Abstract: End-of-the-world (ETW) branes are used in shedding light on Page curve computations, model black hole microstates, and embedding cosmology into holography. I will review braneworld constructions and discuss a mechanism for how the effective theory on the brane arises from a reorganization of UV data. Oftentimes it is useful (as well as natural from an EFT point of view) to introduce additional couplings on the brane. I will show how one can use quantum information theory to constrain the space of gravitational couplings on ETW branes in the case of ETW branes used as BH microstates or cosmologies using the example of an ETW brane embedded into a planar AdS3 black hole geometry: for certain choices of couplings, information spreading in the CFT is in conflict with upper bounds on information or entanglement velocities, ruling out the possibility that the bulk geometry is dual to a CFT state.

general relativity and quantum cosmologyHEP - theorymathematical physics

Audience: researchers in the topic

MIST High-Energy Theory Seminar