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A renormalization group for the truncated conformal space approach
2008
Journal of Statistical Mechanics: Theory and Experiment
We discuss the errors introduced by level truncation in the study of boundary renormalization group (RG) flows using the truncated conformal space approach (TCSA). 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 φ (13) , we propose a RG equation for the coupling constant which predicts a fixed point at a finite value of the TCSA coupling constant and we compare the
doi:10.1088/1742-5468/2008/03/p03011
fatcat:ro3cz7bs2nekheh4fpmhbdlg5q