Numerical Renormalization Group at Criticality

Abstract

We apply a recently developed numerical renormalization group, the corner-transfer-matrix renormalization group (CTMRG), to 2D classical lattice models at their critical temperatures. It is shown that the combination of CTMRG and the finite-size scaling analysis gives two independent critical exponents.Comment: 5 pages, LaTeX, 5 figures available upon reques