Date:

Tuesday, May 26, 2015 - 4:00pm to 5:00pm

Series:

TEP Seminars

**TEP Seminar**

Physics & Astronomy Building (PAB) Room 4-330

Tuesday, May 26, 2015

4-5 PM

Guest Speaker: **Alexandre Belin (Stanford University)**

Title: "String Universality for Permutation Orbifolds"

Abstract:

The hypothesis that every theory of quantum gravity in AdS_3 is a dimensional reduction of string/M-theory leads to a natural conjecture for the density of states of two dimensional CFTs with a large central charge limit. I will prove this conjecture for 2D CFTs which are orbifolds by permutation groups. In particular, I will characterize those permutation groups which give CFTs with well-defined large N limits and can thus serve as holographic duals to bulk gravity theories in AdS_3. I will then show that the holographic dual of a permutation orbifold will have a Hagedorn spectrum in the large N limit. This is evidence that, within this landscape, every theory of quantum gravity with a semi-classical limit is a string theory.

Location:

PAB 4-330

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