220 citations · 1.2k across the 17 of their papers we have counts for
12 papers · 1 filter
Chebyshev matrix product state approach for spectral functions
Andreas Holzner, Andreas Weichselbaum, Ian P. McCulloch +2
We show that recursively generated Chebyshev expansions offer numerically efficient representations for calculating zero-temperature spectral functions of one-dimensional lattice m…
Shedding light on non-equilibrium dynamics of a spin coupled to fermionic reservoir
Hakan E. Türeci, M. Hanl, M. Claassen +7
A single confined spin interacting with a solid-state environment has emerged as one of the fundamental paradigms of mesoscopic physics. In contrast to standard quantum optical sys…
Density matrix renormalization group study of a quantum impurity model with Landau-Zener time-dependent Hamiltonian
Cheng Guo, Andreas Weichselbaum, Stefan Kehrein +2
We use the adaptive time-dependent density matrix renormalization group method (t-DMRG) to study the nonequilibrium dynamics of a benchmark quantum impurity system which has a time…
Kondo decoherence: finding the right spin model for iron impurities in gold and silver
T. A. Costi, L. Bergqvist, A. Weichselbaum +8
We exploit the decoherence of electrons due to magnetic impurities, studied via weak localization, to resolve a longstanding question concerning the classic Kondo systems of Fe imp…
Matrix product state comparison of the numerical renormalization group and the variational formulation of the density matrix renormalization group
Hamed Saberi, Andreas Weichselbaum, Jan von Delft
Wilson's numerical renormalization group (NRG) method for solving quantum impurity models yields a set of energy eigenstates that have the form of matrix product states (MPS). Whit…
Energy-resolved inelastic electron scattering off a magnetic impurity
M. Garst, P. Wölfle, L. Borda +2
We study inelastic scattering of energetic electrons off a Kondo impurity. If the energy E of the incoming electron (measured from the Fermi level) exceeds significantly the Kondo…