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Ritam Sinha (Tata Institute of Fundamental Research, Mumbai)
Date & Time
Thu, 27 October 2016, 15:00 to 16:00
Nambu Discussion Room (Right), ICTS, Bangalore

We explore the issue of thermalization in 1+1 D CFTs with hard wall boundaries that have been suddenly quenched from a gapped to gapless phase. Such quenched states can be modelled by a Cardy-Calabrese state that I shall describe briefly. We study quantities such as the energy density, one point function of primary operators and entanglement en- tropy (EE) in these states and find that all of them show revival with a time-period set by the spatial size of the system. We calculate the EE in the large c limit of the CFT, analytically, at all temperatures. We discuss the prescription for the bulk dual of our BCFT, suggested by Taka- yanagi, and match the holographic EE in this setup with the CFT EE in the Lorentzian signature. At this point, we reflect on some unclear is- sues in the prescription and also on the some aspects of (non-) thermal-ization.