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Harmonic analysis of 2d CFT partition functions

Time: 10:00am (UTC/GMT+8:00, Beijing/Shanghai), Sep. 15 (Wedn.), 2021

Zoom URL: https://us06web.zoom.us/j/82859749886

Meeting ID: 828 5974 9886

Speaker: Nathan Benjamin (Caltech)


I will discuss applying the theory of harmonic analysis on the fundamental domain of SL(2,Z) to partition functions of 2d conformal field theories. As an application I will decompose the partition function of c free bosons on a Narain lattice into eigenfunctions of the Laplacians of worldsheet moduli space H/SL(2,Z) and of target space moduli space O(c,c;Z)\O(c,c;R)/O(c)xO(c). This decomposition will make certain properties of Narain theories including their ensemble averages manifest. I will also discuss applying harmonic analysis to a general irrational 2d CFT and its connection with gravity in AdS3. I will prove that the primary spectrum of any 2d CFT is fully determined by a certain subset of degeneracies.

Invited by Prof. Cheng Peng


Sep 22 2021


China Standard Time
10:00 am - 11:00 am

Local Time

  • Timezone: America/New_York
  • Date: Sep 21 2021
  • Time: 10:00 pm - 11:00 pm

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Location 2

(Kavli ITS) The Kavli Institute for Theoretical Sciences at the University of Chinese Academy of Sciences


(Kavli ITS) Kavli Institute for Theoretical Sciences | University of Chinese Academy of Sciences (UCAS)