Density-matrix spectra for two-dimensional quantum systems
Ming-Chiang Chung, Ingo Peschel
For a two-dimensional system of coupled oscillators, the spectra of reduced density matrices can be obtained analytically. This provides an example where the features of these quantities, which are of central importance in numerical studies using the density-matrix renormalization-group method, can be seen
arXiv:cond-mat/0004222•Physical review. B, Condensed matter•Aug 15, 2000•93 citations