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High Energy Theory Seminar

Friday, February 18, 2022
11:00am to 12:00pm
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Online and In-Person Event
de Sitter Microstates from a solvable generalization of the T-Tbar deformation
Eva Silverstein, Stanford University,

The finite value of the de Sitter entropy suggests a formulation of its observer patch as a system with a finite-dimensional Hilbert space. We show that a new version of the solvable and universal $T\bar T + \Lambda_2$ deformation of a seed holographic CFT gives such a theory at the level of physics accessible in pure gravity. This is sufficient to capture both the finite entropy -- the microstate count - along with a subleading logarithmic correction at large c -- and the bulk dS geometry (but it does not capture model-dependent aspects of bulk matter fields, which requires additional ingredients).   Time permitting we will comment on other aspects of dS quantum gravity by uplifting the AdS/CFT M2-brane theory,  exploiting the positive potential and rigidity of concrete hyperbolic compactifications.  The talk is based on (and time permitting, ).

Limited capacity in 469 Lauritsen.

For Zoom information, please email [email protected]