“School of Physic”
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| Paper IPM / Physic / 6553 |
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| Abstract: | |||||
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A simple modification of the standard Renormalization Group (RG) technique
for the study of quantum spin systems is introduced. By applying this
method to the xxz spin [1/2] Heisenberg chain, we obtain
the ground state energy with much higher accuracy than the standard RG.
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