In this paper a modification of the diagonalization method, originally put forward by Hoen (2002), is suggested which … diagonalization method, seems to be superior to its predecessor. Such a conclusion is supported by the results of comparison of the … relative performance of the rival methods (i.e. the original and modified diagonalization method) which show, among other …

numerical diagonalization method; the low-lying spectrum is directly accessible via the numerical diagonalization method. It has …

exact diagonalization method. The S=12 counterpart has been investigated extensively so far. The easy-plane area, including …

∑i(Si·Si+1)2 is investigated by means of the exact-diagonalization method and the finite-size-scaling analysis. It is shown that …