Theory HEP Seminar

Semiclassical OPE coefficients from 3D gravity

Chi-Ming Chang

Berkeley

We present a closed form expression for the semiclassical OPE coefficients that are universal for all 2D CFTs with a “weak” light spectrum, and match with an analytic continuation of a properly normalized bulk action evaluated on a geometry with three conical defects. The closed form expression is obtained by taking the semiclassical limit of the fusion kernel which relates a vacuum Virasoro block to Virasoro blocks in the cross channel.