7–11 Jul 2025
Northeastern University
US/Eastern timezone

The Horizon Criterion for Spacetimes with boundaries

8 Jul 2025, 16:06
17m
ISEC (Northeastern University)

ISEC

Northeastern University

Interdisciplinary Science & Engineering Complex (ISEC) 805 Columbus Ave, Boston, MA 02120

Speaker

Bjoern Friedrich

Description

It has been speculated that de Sitter space is problematic in quantum gravity due to the presence of cosmological horizons. By considering spacetimes with dynamical boundaries, we argue that if a swampland criterion related to horizons can be formulated, it has to go beyond simply demanding the absence of cosmological horizons. We formulate an appropriate condition and analyze its consequences for situations where the boundary energy-density is set by a scalar field.

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