Special Physics Seminar

Toward Holography in a de Sitter Universe

Dionysios Anninos

Institute for Advanced Study

We explore how the holographic principle, or otherwise said, the map from a problem in a theory where the metric is a fluctuating variable to a quantum/statistical theory where it is not, applies to a de Sitter universe such as our own. This is done through the consideration of simple mathematical toy models where we have a concrete idea of what the two sides of the map look like. The problem is considered both from the perspective of a ‘global’ observer, who can see a large part of the future boundary, and that of a ‘local’ observer, who is shrouded by the presence of a cosmological horizon.