Bootstrapping multi-wound twist effects in symmetric orbifold CFTs

TL;DR

This paper explores the complex effects of twist operators in symmetric orbifold CFTs, revealing how pair creation, propagation, and contraction interrelate in multi-wound scenarios using recursion relations and conformal symmetry.

Contribution

It introduces a novel analysis of multi-wound twist effects, deriving recursion relations that determine effects with minimal inputs, advancing understanding of symmetric orbifold CFTs.

Findings

Derived equations for twist effects using a Bogoliubov ansatz

Established recursion relations for effect coefficients

Reduced input requirements through symmetry constraints

Abstract

We investigate the effects of the twist-2 operator in 2D symmetric orbifold CFTs. The twist operator can join together a twist-$M$ state and a twist-$N$ state, creating a twist-$(M+N)$ state. This process involves three effects: pair creation, propagation, and contraction. We study these effects by using a Bogoliubov ansatz and conformal symmetry. In this multi-wound scenario, pair creation no longer decouples from propagation, in contrast to the previous study where $M=N=1$. We derive equations for these effects, which organize themselves into recursion relations and constraints. Using the recursion relations, we can determine the infinite number of coefficients in the effects through a finite number of inputs. Moreover, the number of required inputs can be further reduced by applying constraints.