Density matrix renormalization group study of a quantum impurity model with Landau-Zener time-dependent Hamiltonian

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dc.creatorGuo, Cheng
dc.creatorWeichselbaum, Andreas
dc.creatorKehrein, Stefan
dc.creatorXiang, Tao
dc.creatorvon Delft, Jan
dc.date2008-10-16
dc.date2009-04-01
dc.date.accessioned2026-07-07T12:58:21Z
dc.date.available2026-07-07T12:58:21Z
dc.descriptionWe 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-dependent Hamiltonian. This model is a resonant-level model, obtained by a mapping from a certain Ohmic spin-boson model describing the dissipative Landau-Zener transition. We map the resonant-level model onto a Wilson chain, then calculate the time-dependent occupation $n_d(t)$ of the resonant level. We compare t-DMRG results with exact results at zero temperature and find very good agreement. We also give a physical interpretation of the numerical results.
dc.description6 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/0810.2900
dc.identifierhttp://arxiv.org/abs/0810.2900
dc.identifierPhys. Rev. B 79, 115137 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.115137
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/225215
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titleDensity matrix renormalization group study of a quantum impurity model with Landau-Zener time-dependent Hamiltonian
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