Block-Spin Approach to Electron Correlations
نویسنده
چکیده
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 Heisenberg chain that by selecting the most important many-body states the technique affords a severe truncation of the Hilbert space while maintaining high accuracy. PACS Nos. 71.10.+x, 75.27.-b Typeset using REVTEX
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تاریخ انتشار 2008