PIRSA:16090049

On Information Loss in AdS3/CFT2

Fitzpatrick, L. (2016). On Information Loss in AdS3/CFT2. Perimeter Institute. https://pirsa.org/16090049

Fitzpatrick, Liam. On Information Loss in AdS3/CFT2. Perimeter Institute, Sep. 27, 2016, https://pirsa.org/16090049 

          @misc{ pirsa_PIRSA:16090049,
            doi = {10.48660/16090049},
            url = {https://pirsa.org/16090049},
            author = {Fitzpatrick, Liam},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {On Information Loss in AdS3/CFT2},
            publisher = {Perimeter Institute},
            year = {2016},
            month = {sep},
            note = {PIRSA:16090049 see, \url{https://pirsa.org}}
          }

Liam Fitzpatrick

Boston University

Talk number
PIRSA:16090049
Collection
Talk Type
Subject
Abstract

We discuss information loss from black hole physics in AdS3, focusing on two sharp signatures infecting CFT2 correlators at large central charge c: `forbidden singularities' arising from Euclidean-time periodicity due to the effective Hawking temperature, and late-time exponential decay in the Lorentzian region. We show that these signatures can be derived from the behavior of the Virasoro conformal blocks at large central charge.  At finite c, we compute non-perturbative effects that resolve the unitarity-violation from forbidden singularities.  Finally, we elaborate on the non-perturbative behavior of Virasoro blocks by classifying all `saddles’ that can contribute for arbitrary values of external and internal operator dimensions in the semiclassical large central charge limit, and discuss their potential to resolve the problem of late-time decay in the Lorentzian regime.