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        Entanglement and entangling power of the dynamics in light-harvesting complexes

        Author
        Caruso, F.
        Chin, A.W.
        Datta, A.
        Huelga, S.F.
        Plenio, M.B.
        Attention
        2299/5719
        Abstract
        We study the evolution of quantum entanglement during exciton energy transfer (EET) in a network model of the Fenna-Matthews-Olson (FMO) complex, a biological pigment-protein complex involved in the early steps of photosynthesis in sulfur bacteria. The influence of Markovian as well as spatially and temporally correlated (non-Markovian) noise on the generation of entanglement across distinct chromophores (site entanglement) and different excitonic eigenstates (mode entanglement) is studied for different injection mechanisms, including thermal and coherent laser excitation. Additionally, we study the entangling power of the FMO complex under natural operating conditions. While quantum information processing tends to favor maximal entanglement, near unit EET is achieved as the result of an intricate interplay between coherent and noisy processes where the initial part of the evolution displays intermediate values of both forms of entanglement.
        Publication date
        2010
        Published in
        Physical Review A
        Published version
        https://doi.org/10.1103/PhysRevA.81.062346
        Other links
        http://hdl.handle.net/2299/5719
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