Conformal field theory complexity from Euler-Arnold equations
Abstract
Defining complexity in quantum field theory is a difficult task, and the main challenge concerns going beyond free models and associated Gaussian states and operations. One take on this issue is to consider conformal field theories in 1+1 dimensions and our work is a comprehensive study of state and operator complexity in the universal sector of their energy-momentum tensor. The unifying conceptual ideas are Euler-Arnold equations and their integro-differential generalization, which guarantee well-posedness of the optimization problem between two generic states or transformations of interest. The present work provides an in-depth discussion of the results reported in arXiv:2005.02415 and techniques used in their derivation. Among the most important topics we cover are usage of differential regularization, solution of the integro-differential equation describing Fubini-Study state complexity and probing the underlying geometry.
Cite
@article{arxiv.2007.11555,
title = {Conformal field theory complexity from Euler-Arnold equations},
author = {Mario Flory and Michal P. Heller},
journal= {arXiv preprint arXiv:2007.11555},
year = {2021}
}
Comments
31 pages + appendicies, 2 figures, extended version of arXiv:2005.02415 v2: added references and minor improvements