1994/12/20 by Antimo Angelucci · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat
paper · pdf · doi:10.1103/physrevb.51.11580
12 pages, REVTeX 3.0, no figures
arxiv created 1994/12/20 · openalex publication_date 1995/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We present an exact, unconstrained representation of the electron operators in terms of operators of opposite statistics. We propose a path-integral representation for the t-J model and introduce a parameter controlling the semiclassical behavior. We extend the functional approach to the Hubbard model and show that the mean-field theory is equivalent to considering, at Hamiltonian level, the Falikov-Kimball model. Connections with a bond-charge model are also discussed.