TY - RPRT TI - Vertical density matrix algorithm: a higher-dimensional numerical renormalization scheme based on the tensor product state ansatz. AU - N Maeshima AU - Y Hieida AU - Y Akutsu AU - T Nishino AU - K Okunishi PY - 2001 DO - 10.1103/physreve.64.016705 UR - https://pubmed.ncbi.nlm.nih.gov/11461440/ ID - 11461440 ER -