Sine-Gordon breather form factors and quantum field equations

@article{Babujian2002SineGordonBF,
  title={Sine-Gordon breather form factors and quantum field equations},
  author={Hrachya M. Babujian and Michael Karowski},
  journal={Journal of Physics A},
  year={2002},
  volume={35},
  pages={9081-9104}
}
Using the results of previous investigations on sine-Gordon form factors, exact expressions of all breather matrix elements are obtained for several operators: all powers of the fundamental Bose field, general exponentials of it, the energy–momentum tensor and all higher currents. Formulae for the asymptotic behaviour of bosonic form factors are presented which are motivated by Weinberg's power counting theorem in perturbation theory. It is found that the quantum sine-Gordon field equation… 
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