3 papers
hep-th2026
More About the Spontaneous Breaking of Time Reversal in de Sitter Space
Leonard Susskind
It is widely thought that the quantum theory of de Sitter space requires the existence of a physical observer in the static patch. What exactly is meant by an observer is unclear;…
hep-th2025
Why do we Need Observers? Spontaneous Breaking of Time-Reversal in de Sitter Space
Leonard Susskind
In this paper I explain the relation between the need for observers in de Sitter space and the spontaneous breakdown of time-reversal symmetry.
hep-th2025
Where is the Entropy in DSSYK-de Sitter? Correction to a wrong claim
Leonard Susskind
A question arises in the holographic description of the static patch of de Sitter space: Where does the entropy reside? The answer of course is in the stretched horizon, but how fa…