Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-03-12
Phys.Lett. B430 (1998) 264-273
Physics
High Energy Physics
High Energy Physics - Theory
12 pages, 5 eps figures, LaTeX2e. Reference added, changes in the discussion of TCS method
Scientific paper
10.1016/S0370-2693(98)00543-7
We develop Truncated Conformal Space (TCS) technique for perturbations of c=1 Conformal Field Theories. We use it to give the first numerical evidence of the validity of the non-linear integral equation (NLIE) derived from light-cone lattice regularization at intermediate scales. A controversy on the quantization of Bethe states is solved by this numerical comparison and by using the locality principle at the ultra- violet fixed point. It turns out that the correct quantization for pure hole states is the one with half-integer quantum numbers originally proposed by Mariottini et al. Once the correct rule is imposed, the agreement between TCS and NLIE for pure hole states turns out to be impressive.
Feverati Giovanni
Ravanini Francesco
Taka'cs Ga'bor
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