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Impurity corrections to the thermodynamics in spin chains using a transfer-matrix DMRG method

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arxiv cond-mat/9812001 v1 pith:PCOTDNRA submitted 1998-12-01 cond-mat.str-el

Stefan Rommer , Sebastian Eggert This is my paper · ORCID
classification cond-mat.str-el
keywords impuritychaincorrectionsdmrgmethodspinanalysisapplied
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We use the density matrix renormalization group (DMRG) for transfer matrices to numerically calculate impurity corrections to thermodynamic properties. The method is applied to two impurity models in the spin-1/2 chain, namely a weak link in the chain and an external impurity spin. The numerical analysis confirms the field theory calculations and gives new results for the crossover behavior.

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