Extreme Parametric Sensitivity in the Steady-State Photoisomerization of Model Retinal

Abstract

The photoisomerization reaction of the retinal chromophore in rhodopsin was computationally studied using a two-state two-mode model coupled to thermal baths. Reaction quantum yields at the steady state (10 ps and beyond) were found to be considerably different than their transient values, suggesting a weak correlation between transient and steady-state dynamics in these systems. Significantly, the steady-state quantum yield was highly sensitive to minute changes in system parameters, while transient dynamics was nearly unaffected. Correlation of such sensitivity with standard level spacing statistics of the nonadiabatic vibronic system suggests a possible origin in quantum chaos. The feasibility of experimental observation of this phenomenon and its implications in condensed-phase photochemistry and biological light sensing are discussed.

arXiv comment20 pages, 5 figures including TOC

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Cited by in corpus (4)

• Analog Quantum Simulation of the Dynamics of Open Quantum Systems with Quantum Dots and Microelectronic Circuits
• Mapping Electronic Decoherence Pathways in Molecules
• Noise-Induced Coherence in Molecular Processes
• Nonadiabatic transition paths from quantum jump trajectories