Expectation value of composite field $T{\bar T}$ in two-dimensional quantum field theory
High Energy Physics - Theory
2007-05-23 v1
Abstract
I show that the expectation value of the composite field , built from the components of the energy-momentum tensor, is expressed exactly through the expectation value of the energy-momentum tensor itself. The relation is derived in two-dimensional quantum field theory under broad assumptions, and does not require integrability.
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Cite
@article{arxiv.hep-th/0401146,
title = {Expectation value of composite field $T{\bar T}$ in two-dimensional quantum field theory},
author = {Alexander B. Zamolodchikov},
journal= {arXiv preprint arXiv:hep-th/0401146},
year = {2007}
}
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12 pages