Matrix elements of the operator T\bar{T} in integrable quantum field theory

Details Matrix elements of the operator T\bar{T} in integrable quantum field theory Matrix elements of the operator T\bar{T} in integrable quantum field theory

2004-07-16

arxiv.org/abs/hep-th/0407142v2

Nucl.Phys. B707 (2005) 381-404

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, one reference added

Scientific paper

10.1016/j.nuclphysb.2004.11.041

Recently A. Zamolodchikov obtained a series of identities for the expectation values of the composite operator T\bar{T} constructed from the components of the energy-momentum tensor in two-dimensional quantum field theory. We show that if the theory is integrable the addition of a requirement of factorization at high energies can lead to the exact determination of the generic matrix element of this operator on the asymptotic states. The construction is performed explicitly in the Lee-Yang model.

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