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.

Matrix elements of the operator T-Tbar in integrable quantum field theory / Delfino, Gesualdo; Niccoli, G.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - 707:3(2005), pp. 381-404. [10.1016/j.nuclphysb.2004.11.041]

### Matrix elements of the operator T-Tbar in integrable quantum field theory

#### Abstract

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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707
3
381
404
Delfino, Gesualdo; Niccoli, G.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/16939
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