Browsing by Subject "quantum system"

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  • Generalized Hartree-Fock theory for the dispersion relations of interacting fermionic lattice systems 
    Kraus, Christina V.; Osborne, Tobias J. (College Park, MD : American Physical Society, 2013)
    We study the variational solution of generic interacting fermionic lattice systems using fermionic Gaussian states and show that the process of gaussification, leading to a nonlinear closed equation of motion for the ...
  • Light-front Ward-Takahashi identity and current conservation 
    Marinho, J.A.O.; Frederico, T.; Sauer, P.U. (College Park, MD : American Physical Society, 2007)
    We construct a conserved electromagnetic current for two-boson systems in finite mass boson exchange models within light-front dynamics. For that purpose, we use a quasipotential reduction to perform the three-dimensional ...