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Memory effects in single-molecule spectroscopy
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DOI：10.1016/j.jlumin.2007.02.064.png)
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Abstract
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From the time series of LH2 optical single-molecule fluorescence excitation spectra of Rhodospirillum molischianum the memory function of the Mori-Zwanzig equation for the optical intensity is derived numerically. We show that the time dependence of the excited states is determined by at least three different non-Markovian stochastic processes with decay constants for the Mori-Zwanzig kernel on the order of 1-5 min(-1). We suggest that this decay stems from the conformational motion of the protein scaffold of LH2. (C) 2007 Elsevier B.V. All rights reserved.
Keywords:
exciton
LH2 light-harvesting systems
single-molecule spectroscopy
times series of optical spectra
Mori-Zwanzig equation
memory function
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