Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 82: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 2
TT 82.7: Vortrag
Donnerstag, 10. März 2016, 18:00–18:15, H22
Electron-phonon scattering in one-dimensional systems — •Christoph Brockt1, Eric Jeckelmann1, Florian Dorfner2, Lev Vidmar2, and Fabian Heidrich-Meisner2 — 1Leibniz Universität Hannover, Germany — 2Ludwig-Maximilians-Universität München, Germany
We present a study of the scattering of an electronic wave packet by local phonon modes on an one-dimensional lattice. The problem is adressed both numerically and analytically. We find features like transient self-trapping, reflection and dissipation, where the latter two exhibit resonance effects. The parameter range includes the adiabatic, antiadiabatic, weak- and strong coupling regimes. For the numerical part we use a newly developed method for simulating the time evolution of systems with large local Hilbert spaces [1]. It combines the time-evolving block-decimation algorithm [2] with a dynamical optimization of the local boson basis. We use the optimal boson modes [3] to speed up our simulations as well as for gaining insight into the physics of the system.
Support from the DFG through the Research Unit FOR 1807 is gratefully acknowledged.
[1] C. Brockt et al., arXiv:1508.00694v1 (2015)
[2] G. Vidal, PRL 93, 040502 (2004)
[3] C. Zhang, E. Jeckelmann, and S. R. White, PRL 80, 2661 (1998)