De Sitter Holography: Fluctuations, Anomalous Symmetry, and Wormholes

The Goheer-Kleban-Susskind no-go theorem says that the symmetry of de Sitter space is incompatible with finite entropy. The meaning and consequences of the theorem are discussed in light of recent developments in holography and gravitational path integrals. The relation between the GKS theorem, Boltzmann fluctuations, wormholes, and exponentially suppressed non-perturbative phenomena suggests that the classical symmetry between different static patches is broken and that eternal de Sitter space-if it exists at all-is an ensemble average.

Automated summary

The Goheer-Kleban-Susskind no-go theorem highlights the incompatibility between the symmetry of de Sitter space and finite entropy. Recent developments suggest that eternal de Sitter space, if it exists, may just be an ensemble average.