123 citations · 681 across the 33 of their papers we have counts for
35 papers
A fresh view on string orbifolds
Stefano Giaccari, Roberto Volpato
In quantum field theory, an orbifold is a way to obtain a new theory from an old one by gauging a finite global symmetry. This definition of orbifold does not make sense for quantu…
BPS Algebras in 2D String Theory
Sarah M. Harrison, Natalie M. Paquette, Daniel Persson +1
We discuss a set of heterotic and type II string theory compactifications to 1+1 dimensions that are characterized by factorized internal worldsheet CFTs of the form $V_1\otimes \b…
Fun with
Sarah M. Harrison, Natalie M. Paquette, Daniel Persson +1
We study some special features of , the holomorphic superconformal field theory (SCFT) given by 24 chiral free fermions. We construct eight different Lie superalgebr…
Vertex operator superalgebra/sigma model correspondences: The four-torus case
Vassilis Anagiannis, Miranda C. N. Cheng, John Duncan +1
We propose a correspondence between vertex operator superalgebras and families of sigma models in which the two structures are related by symmetry properties and a certain reflecti…
Some comments on symmetric orbifolds of K3
Roberto Volpato
We consider two dimensional superconformal field theories in the moduli space of symmetric orbifolds of K3. We complete a classification of the discrete groups…
A Borcherds-Kac-Moody superalgebra with Conway symmetry
Sarah M. Harrison, Natalie M. Paquette, Roberto Volpato
We construct a Borcherds Kac-Moody (BKM) superalgebra on which the Conway group Co acts faithfully. We show that the BKM algebra is generated by the BRST-closed states in a chi…