NON-LINEAR INTEGRAL EQUATION AND EXCITED-STATES SCALING FUNCTIONS IN THE SINE-GORDON MODEL
作者： C. Destri , H.J. de Vega
DOI: 10.1016/S0550-3213(97)00468-9
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摘要: Abstract The NLIE (the non-linear integral equation equivalent to the Bethe ansatz equations for finite size) is generalized excited states, that states with holes and complex roots over antiferromagnetic ground state. We consider sine-Gordon/massive Thirring model (sG/mT) in a periodic box of length L using light-cone approach, which sG/mT obtained as continuum limit an inhomogeneous six-vertex model. This useful starting point compute spectrum both analytically large (perturbative) small (conformal) regimes well numerically. derive conformal weights non-string (close wide roots) UV limit. These agree Coulomb gas description, yielding related by duality IR
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