Low energy properties of non-perturbative quantum systems: a space reduction approach
arXiv:0711.3906 · doi:10.1016/j.physleta.2007.11.044
Abstract
We propose and test a renormalization procedure which acts in Hilbert space. We test its efficiency on strongly correlated quantum spin systems by working out and analyzing the low-energy spectral properties of frustrated quantum spin systems in different parts of the phase diagram and in the neighbourhood of quantum critical points.
13 pages, 3 figures, to appear in PLA