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Low energy effective Hamiltonian for the XXZ spin chain
S. Lukyanov
Coupling constants for the most relevant terms in the low energy effective Hamiltonian of the XXZ spin chain are derived. Using this result we study the low energy (low temperature…
Expectation values of local fields in Bullough-Dodd model and integrable perturbed conformal field theories
V. Fateev, S. Lukyanov, A. Zamolodchikov +1
Exact expectation values of the fields e^{aϕ} in the Bullough-Dodd model are derived by adopting the ``reflection relations'' which involve the reflection S-matrix of the Liouville…
Angular quantization and form-factors in massive integrable models
V. Brazhnikov, S. Lukyanov
We discuss an application of the method of the angular quantization to reconstruction of form-factors of local fields in massive integrable models. The general formalism is illustr…
Form-factors of exponential fields in the affine A^{(1)}_{N-1} Toda model
S. Lukyanov
A free field representation for form-factors of exponential operators in the affine A^{(1)}_{N-1} Toda model is proposed. The one and two particle form-factors are calculated expli…
Form-factors of exponential fields in the sine-Gordon model
S. Lukyanov
An integral representation for form-factors of exponential fields in the sine-Gordon model is proposed.
Expectation values of boundary fields in the boundary sine-Gordon model
V. Fateev, S. Lukyanov, A. Zamolodchikov +1
We propose an explicit expression for vacuum expectation values of the boundary field e^{iaϕ_{B}} in the boundary sine-Gordon model with zero bulk mass. This expression agrees with…