Connection between world-line and determinantal functional-integral formulations of the Hubbard model

作者：J. E. Hirsch · 发表于：Physical review. B, Condensed matter · 年份：1986 · DOI：10.1103/physrevb.34.3216 · 被引用次数：29 · 研究领域：Black Holes and Theoretical Physics、Physics of Superconductivity and Magnetism、Algebraic structures and combinatorial models

A new functional-integral formulation of the Hubbard model is introduced that interpolates smoothly between the world-line formulation, which involves a direct-space--imaginary-time representation of the fermion fields, and a determinantal formulation, where auxiliary boson fields are introduced and the fermions are integrated out. Various features of the new formulation, particularly in connection with numerical simulations, are discussed.