Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-02-20
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
We show that numerical quasi-one-dimensional renormalization group allows accurate study of weakly coupled chains with modest computational effort. We perform a systematic comparison with exact diagonalization results in two and three-leg spin ladders with a transverse Hamiltonian that can involve frustration. Due to the variational nature of the algorithm, the accuracy can be arbitrarily improved enlarging the basis of eigenstates of the density matrix defined in the transverse direction. We observe that the precision of the algorithm is directly correlated to the binding of the chains. We also show that the method performs especially well in frustrated systems.
Alvarez J. V.
Moukouri Samuel
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