当然还有其他方案比如bosonization(挖个坑,以后再放一章),但是bosonization在一维,最多在某些二维问题中适用,因此总的来看,HS变换是我们构造关联电子体系的低能有效理论的最重要的手段!其精神也被用于一些多体数值技术中。
We settle a long standing issue concerning the traditional derivation of\nnon-compact non-linear sigma models in the theory of disordered electron\nsystems: the hyperbolic Hubbard-Stratonovich (HS) transformation of\nPruisken-Schaefer type. Only recently the validity of such transformations was\n...