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The effect of memory in the stochastic master equation analyzed using the stochastic Liouville equation of motion: Electronic energy migration transfer between reorienting donor–donor, donor–acceptor chromophores
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Chemistry.
2005 (English)In: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Vol. 61, no 1-2, 299-304 p.Article in journal (Refereed) Published
Abstract [en]

This paper discusses the process of energy migration transfer within reorientating chromophores using the stochastic master equation (SME) and the stochastic Liouville equation (SLE) of motion. We have found that the SME over-estimates the rate of the energy migration compared to the SLE solution for a case of weakly interacting chromophores. This discrepancy between SME and SLE is caused by a memory effect occurring when fluctuations in the dipole–dipole Hamiltonian (H(t)) are on the same timescale as the intrinsic fast transverse relaxation rate characterized by (1/T2). Thus the timescale critical for energy-transfer experiments is T2≈10−13 s. An extended SME is constructed, accounting for the memory effect of the dipole–dipole Hamiltonian dynamics. The influence of memory on the interpretation of experiments is discussed.

Place, publisher, year, edition, pages
2005. Vol. 61, no 1-2, 299-304 p.
Keyword [en]
Stochastic Liouville equation, Stochastic master equation, Electronic energy migration, Memory effect, Förster theory
Identifiers
URN: urn:nbn:se:umu:diva-14764DOI: doi:10.1016/j.saa.2004.03.013OAI: oai:DiVA.org:umu-14764DiVA: diva2:154436
Available from: 2007-06-15 Created: 2007-06-15 Last updated: 2011-01-12Bibliographically approved

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