Random phase approximation for the 1D anti-ferromagnetic Heisenberg model

Rabhi, A.; Schuck, P.; Da Providencia, J.

doi:10.1088/0953-8984/18/45/011

arXiv 2006-01-12 DOI 10.1088/0953-8984/18/45/011 0 مشاهدة

Random phase approximation for the 1D anti-ferromagnetic Heisenberg model

Rabhi, A. · Schuck, P. · Da Providencia, J.

Strongly Correlated Electrons Other Condensed Matter

الأصل · EN

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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