A Renormalisation group for TCSA

Details A Renormalisation group for TCSA A Renormalisation group for TCSA

2006-12-19

arxiv.org/abs/hep-th/0612203v1

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 7 figures, talk presented by G Watts at the workshop "Integrable Models and Applications: from Strings to Condensed

Scientific paper

We discuss the errors introduced by level truncation in the study of boundary renormalisation group flows by the Truncated Conformal Space Approach. We show that the TCSA results can have the qualitative form of a sequence of RG flows between different conformal boundary conditions. In the case of a perturbation by the field phi(13), we propose a renormalisation group equation for the coupling constant which predicts a fixed point at a finite value of the TCSA coupling constant and we compare the predictions with data obtained using TBA equations.

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