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High Energy Theory Seminar

Wednesday, February 7, 2024
12:00pm to 1:00pm
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Online and In-Person Event
Stretched horizon, replica trick, and off-shell winding condensate, and all that
Indranil Halder, Harvard University,

$\alpha'$ corrections to near horizon dynamics of a Schwarzschild black hole in a large number of spacetime dimensions $D$ are governed by the worldsheet theory composed of the cigar CFT and the classical sigma model on the sphere at the horizon, along with a timelike-Liouville theory of central charge $26-D$. At leading order in weak string coupling, blackhole thermodynamics is insensitive to the details of timelike Liouville theory. In this limit, I'll use Lewkowycz-Maldacena-trick motivated infinitesimally off-shell closed string worldsheet formalism in  [arxiv: 2310.02313] to calculate thermal entropy exactly in $\alpha'$. We will see that the leading term in $\alpha'\to 0$ limit and the first stingy correction of the result is in precise agreement with the target space Callan-Myers-Perry formula.

The talk is in 469 Lauritsen.

Contact [email protected] for Zoom information.