Online Gravity Theory Seminar

Date
Wed, Sep 22, 2021 3:00 pm - 4:00 pm

Description

Seminar will be conducted via zoom: https://umd.zoom.us/j/99307158788

Speaker: Phuc Nguyen, Lehman College, CUNY and University of Haifa 

Title: 
Modular Hamiltonians of excited CFT states

Abstract:
We consider excited states in a conformal field theory, obtained by applying a weak unitary perturbation to the vacuum, and study the corresponding modular Hamiltonian for the Rindler half-space. The perturbation is generated by the integral of a local operator of modular weight n over a spacelike surface passing through x = 0. We find that if the perturbation has support at the boundary, then in addition to bulk terms the modular Hamiltonian has a novel contribution which takes the form of an integral over the Rindler horizon of a linear combination of the perturbing operator and its descendants. We briefly comment on the implications for holography.