Dissipative Exciton Transfer in Donor-Bridge-Acceptor Systems: Numerical Renormalization Group Calculation of Equilibrium Properties

Abstract

We present a detailed model study of exciton transfer processes in donor-bridge-acceptor (DBA) systems. Using a model which includes the intermolecular Coulomb interaction and the coupling to a dissipative environment we calculate the phase diagram, the absorption spectrum as well as dynamic equilibrium properties with the numerical renormalization group. This method is non-perturbative and therefore allows to cover the full parameter space, especially the case when the intermolecular Coulomb interaction is of the same order as the coupling to the environment and perturbation theory cannot be applied. For DBA systems up to six sites we found a transition to the localized phase (self-trapping) depending on the coupling to the dissipative environment. We discuss various criteria which favour delocalized exciton transfer.

10 pages, 12 figures

References in corpus (4)

• Real-time dynamics in Quantum Impurity Systems: A Time-dependent Numerical Renormalization Group Approach
• Numerical Renormalization Group for Bosonic Systems and Application to the Subohmic Spin-Boson Model
• Creating excitonic entanglement in quantum dots through the optical Stark effect
• Electron Transfer in Donor-Acceptor Systems: Many-Particle Effects and Influence of Electronic Correlations

Cited by in corpus (2)

• The numerical renormalization group method for quantum impurity systems
• Phase diagram of the dissipative quantum particle in a box