47 citations · 75 across the 4 of their papers we have counts for
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Dominant particle-hole contributions to the phonon dynamics in the spinless one-dimensional Holstein model
S. Sykora, A. Huebsch, K. W. Becker
In the spinless Holstein model at half-filling the coupling of electrons to phonons is responsible for a phase transition from a metallic state at small coupling to a Peierls disto…
Renormalization of the periodic Anderson model: an alternative analytical approach to heavy Fermion behavior
A. Huebsch, K. W. Becker
In this paper a recently developed projector-based renormalization method (PRM) for many-particle Hamiltonians is applied to the periodic Anderson model (PAM) with the aim to descr…
Computer aided perturbation theory by cumulants: dimerized and frustrated spin 1/2 chain
S. Sykora, A. Huebsch, K. W. Becker
This paper demonstrates that a computer aided perturbation theory can easily be realized by use of a cumulant approach. In contrast to a recent alternative formulation on the basis…
Single-particle excitations and phonon softening in the one-dimensional spinless Holstein model
S. Sykora, A. Huebsch, K. W. Becker +2
We investigate the influence of the electron-phonon coupling in the one-dimensional spinless Holstein model at half-filling using both a recently developed projector-based renormal…