Real-time dynamics in Quantum Impurity Systems: A Time-dependent Numerical Renormalization Group Approach

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We develop a general approach to the nonequilibrium dynamics of quantum impurity systems for arbitrary coupling strength. The numerical renormalization group is used to generate a complete basis set necessary for the correct description of the time evolution. We benchmark our method with the exact analytical solution for the resonant-level model. As a first application, we investigate the equilibration of a quantum dot subject to a sudden change of the gate voltage and external magnetic field. Two distinct relaxation times are identified for the spin and charge dynamics.
5 pages, 5 figures

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Strongly Correlated Electrons, Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/95946

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0505553
 http://arxiv.org/abs/cond-mat/0505553
 Phys. Rev. Lett. 95, 196801 (2005)
 doi:10.1103/PhysRevLett.95.196801

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arXiv