Random phase approximation for the 1D anti-ferromagnetic Heisenberg model
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❄️ cond-mat.str-el
cond-mat.other
keywords
anti-ferromagneticheisenbergmodelphaseresultsapplicationappliedapproach
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The Hartree-Fock-RPA approach is applied to the 1D anti-ferromagnetic Heisenberg model in the Jordan-Wigner representation. Somewhat contrary to expectation, this leads to reasonable results for spectral functions and sum rules in the symmetry unbroken phase. In a preliminary application of Self-Consistent RPA to finite size chains strongly improved results are obtained.
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