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The density matrix renormalization group (DMRG) is a numerical variational technique devised to obtain the low-energy physics of quantum many-body systems with high accuracy. As a variational method, DMRG is an efficient algorithm that attempts to find the lowest-energy matrix product state wavefunction of a Hamiltonian. It was invented in 1992 by Steven R. White and it is nowadays the most efficient method for 1-dimensional systems.[1]
- ^ Nakatani, Naoki (2018), "Matrix Product States and Density Matrix Renormalization Group Algorithm", Reference Module in Chemistry, Molecular Sciences and Chemical Engineering, Elsevier, doi:10.1016/b978-0-12-409547-2.11473-8, ISBN 978-0-12-409547-2, retrieved 2021-04-21