Applying time-local theories to dissipative dynamics and transport |
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| Ulrich Kleinekathöfer | |
| Jacobs University Bremen | |
| After a short introduction to the numerical decomposition of spectral densities and the system-environment theories emerging from this, we will concentrate on two different applications [1]. In the first example the linear absorption spectrum of an ensemble of B850 rings of the light-harvesting system LH2 of purple bacteria is calculated. Using different levels of approximation it is shown that non-Markovian features can show up in linear absorption spectra already [2]. As a second application the influence of laser pulses on the transport through molecular wires is investigated within a tight-binding model [3,4]. The current through the wire can be suppressed either applying the phenomenon of coherent destruction of tunneling or by using optimal control theory. The basics of these two different scenarios are discussed together with their respective advantages. [1] Reduced dynamics of coupled harmonic oscillators using higher-order perturbation theory [2] Absorption spectra for light harvesting systems based on different quantum master equations [3] Coherent laser control of the current through molecular junctions [4] Tailoring current flow patterns through molecular wires using shaped optical pulses |