Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 23: Quantum Effects: Light Scattering and Propagation II / QED I

Q 23.7: Vortrag

Mittwoch, 10. März 2010, 12:15–12:30, A 320

Motional effects on the efficiency of excitation transfer — •Markus Tiersch^1,2, Ali Asadian^1,2, Gian Giacomo Guerreschi^1,2, Jianming Cai^1,2, Sandu Popescu^3,4, and Hans J. Briegel^1,2 — ¹Institut für Quantenoptik und Quanteninformation der Österreichischen Akademie der Wissenschaften, Innsbruck, Austria — ²Institut für Theoretische Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria — ³H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K. — ⁴Hewlett-Packard Laboratories, Stoke Gifford, Bristol BS12 6QZ, U.K.

The transfer of energy plays a vital role in many natural and technological processes. In this work, we study the effects of classical motion on the electronic excitation transfer through a chain of interacting molecules. Our investigation demonstrates that for various types of oscillations, in a suitable range of frequencies, the efficiency of the energy transfer is significantly enhanced. This enhancement is a signature of the collaborative interplay between the coherent evolution of the excitation and the classical motion of the molecules. This effect has no analogue in the classical, incoherent energy transfer. In addition, we discuss control techniques to optimize the excitation transfer along the chain.