Conformal field theory complexity from Euler-Arnold equations
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Publication:2660240
DOI10.1007/JHEP12(2020)091zbMATH Open1457.81100arXiv2007.11555OpenAlexW3111968929WikidataQ104507347 ScholiaQ104507347MaRDI QIDQ2660240
Author name not available (Why is that?)
Publication date: 29 March 2021
Published in: (Search for Journal in Brave)
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.
Full work available at URL: https://arxiv.org/abs/2007.11555
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