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Quasiparticles in the Kondo lattice model at partial fillings of the conduction band using the density matrix renormalization group
We study the spectral properties of the one-dimensional Kondo lattice model as a function of the exchange coupling, the band filling, and the quasimomentum in the ferromagnetic and paramagnetic phases. Using the density-matrix renormalization group method, we compute the dispersion relation of the quasiparticles, their lifetimes, and the $Z$ factor. …