Mechanisms in Adaptive Feedback Control: Photoisomerization in a Liquid

Details Mechanisms in Adaptive Feedback Control: Photoisomerization in a Liquid Mechanisms in Adaptive Feedback Control: Photoisomerization in a Liquid

2005-09-02

arxiv.org/abs/quant-ph/0509024v1

Physics

Quantum Physics

10 pages, 3 figures, to be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.95.168305

The underlying mechanism for Adaptive Feedback Control in the experimental photoisomerization of NK88 in methanol is exposed theoretically. With given laboratory limitations on laser output, the complicated electric fields are shown to achieve their targets in qualitatively simple ways. Further, control over the cis population without laser limitations reveals an incoherent pump-dump scenario as the optimal isomerization strategy. In neither case are there substantial contributions from quantum multiple-path interference or from nuclear wavepacket coherence. Environmentally induced decoherence is shown to justify the use of a simplified theoretical model.

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