T. Nishino, K. Okunishi
Published 1996-10-14Version 1
We review the variational principle in the density matrix renormalization group (DMRG) method, which maximizes an approximate partition function within a restricted degrees of freedom; at zero temperature, DMRG mini- mizes the ground state energy. The variational principle is applied to two-dimensional (2D) classical lattice models, where the density matrix is expressed as a product of corner transfer matrices. (CTMs) DMRG related fields and future directions of DMRG are briefly discussed.
Comments: 21 pages, Latex, 14 figures in postscript files, Proc. of the 1996 El Escorial Summer School on "Strongly Correlated Magnetic and Superconducting Systems"
Density Matrix Renormalization Group and Reaction-Diffusion Processes
Angular quantization and the density matrix renormalization group
Systems, variational principles and interconnections in nonequilibrium thermodynamics
