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Theory Seminar (High Energy/Cosmology)
De Sitter shockwave and static patch holography
Date: Monday, September 14th
Time: 1:00 pm - 2:30 pm
Place: Chamberlin 5280
Speaker: Yiming Chen, Stanford University
Abstract: We study a version of de Sitter static patch holography in which the Euclidean gravitational path integral, with an observer worldline included, is conjectured to compute a trace. Motivated by recent evidence for this conjecture from the sphere path integral, we test it further by inserting operators along the observer worldline and computing two-point functions and out-of-time-ordered four-point correlators (OTOCs). Building on earlier work, we compute the OTOC using the shockwave formalism, incorporating both observer recoil and gravitational backreaction. I will explain that the OTOC conflicts with two basic properties of a trace in a Hilbert space: cyclicity and positivity. This talk is based on arXiv:2607.14042.
Host: Jakob Moritz
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