Correlation-dependent coherent to incoherent transitions in resonant energy transfer dynamics

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    I investigate energy transfer in a donor-acceptor pair beyond weak system-bath coupling. I identify a transition from coherent to incoherent dynamics with increasing temperature, due to multiphonon effects not captured by a standard weak-coupling treatment. The crossover temperature has a marked dependence on the degree of spatial correlation between fluctuations experienced at the two system sites. For strong correlations, this leads to the possibility of coherence surviving into a high-temperature regime. © 2009 The American Physical Society.
    Original languageEnglish
    Article number146404
    JournalPhysical Review Letters
    Issue number14
    Publication statusPublished - 1 Oct 2009

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