Block-Spin Approach to Electron Correlations

Details Block-Spin Approach to Electron Correlations Block-Spin Approach to Electron Correlations

1997-06-30

arxiv.org/abs/cond-mat/9706308v1

Physics

Condensed Matter

Strongly Correlated Electrons

17 pages, 3 Postscript figures

Scientific paper

10.1103/PhysRevB.56.11653

We consider an expansion of the ground state wavefunction of quantum lattice many-body systems in a basis whose states are tensor products of block-spin wavefunctions. We demonstrate by applying the method to the antiferromagnetic spin-1/2 chain that by selecting the most important many-body states the technique affords a severe truncation of the Hilbert space while maintaining high accuracy.

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