Brillouin-Wigner and Feenberg perturbation methods in many-body theory

被引:0
作者
Keiter, H [1 ]
Kilic, S [1 ]
机构
[1] UNIV SPLIT,FAC NAT SCI & ARTS,SPLIT 58000,CROATIA
关键词
perturbation theory; Tomonaga model; correlated electrons;
D O I
暂无
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Brillouin-Wigner (BW) perturbation formulae can be rearranged into a form first proposed by Feenberg. Feenberg's perturbation formulae also follow from a variational principle. They are successfully tested at two typical problems, for which ordinary perturbation techniques completely fail. The first is to find conditions for the bosonization of the Tomonaga model perturbatively. The second is to clarify whether non-Fermi liquid behavior of the momentum distribution function of the Luttinger model can be achieved perturbatively.
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页码:608 / 624
页数:17
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