Browsing by Subject "density matrix renormalization group"

Browsing by Subject "density matrix renormalization group"

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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 ...
  • S matrix from matrix product states 
    Vanderstraeten, Laurens; Haegeman, Jutho; Osborne, Tobias J.; Verstraete, Frank (College Park, MD : American Physical Society, 2014)
    We use the matrix product state formalism to construct stationary scattering states of elementary excitations in generic one-dimensional quantum lattice systems. Our method is applied to the spin-1 Heisenberg antiferromagnet, ...