WebWe develop a quantum many-body theory of the Bose-Hubbard model based on the canonical quantization of the action derived from a Gutzwiller mean-field ansatz. Our theory is a systematic generalization of the Bogoliubov theory of weakly interacting gases. The control parameter of the theory, defined as the zero point
Equivalence of Gutzwiller and slave-boson mean-field theories
WebJul 27, 2012 · Jörg Bünemann. In this tutorial presentation, we give a comprehensive introduction into the Gutzwiller variational approach and its merger with the density … WebApr 22, 1991 · This approach uncovers the limitations of the Gutzwiller approximation and clarifies its connection to the "auxiliary-boson" mean- field theory of the Anderson model, leading to a novel strong-coupling mean-field theory which allows for a unified treatment of antiferromagnetism and ferromagnets, metal-to-insulator transition, and Kondo … fit ayrshire babies
Equivalence of Gutzwiller and slave-boson mean-field theories
WebDec 21, 2004 · Abstract. We extend the results of Lewenstein et al. [Phys. Rev. Lett. 92 (2004) 050401] and determine the phase diagram of a mixture of ultracold bosons and polarized fermions placed in an optical lattice using mean field theory. We obtain the analytic form of the phase boundaries separating the composite fermion phases that … WebJul 20, 2024 · We examine the zero- and finite-temperature phase diagrams of soft-core bosons of the extended Bose-Hubbard model on a square optical lattice. To study … WebMar 6, 2024 · In this paper, we study the two-components extended BH model on a two-dimensional(2D) square lattice. By employing the inhomogeneous dynamical Gutzwiller mean-field theory (DGMFT) , , , we reveal the quantum phases in which the order parameter and occupancy are displayed site by site. With periodic boundary condition, … fit ayrshire dads