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dc.contributor.authorRotter, Ingrid
dc.contributor.authorEleuch, Hichem
dc.descriptionPhotosynthetic organisms capture visible light in their light-harvesting complex and transfer the excitation energy to the reaction center, which stores the energy from the photon in chemical bonds. This process occurs with nearly perfect efficiency. The primary process occurring in the light harvesting complex is the exciton transfer between acceptor and donor,while the transfer of the energy to the reaction center appears as a secondary process.Both processes are not hing but two parts of the total light harvesting.en_US
dc.description.abstractPhotosynthesis is the basic process used by plants to convert light energy in reaction centers into chemical energy. The high efficiency of this process is not yet understood today. Using the formalism for the description of open quantum systems by means of a non-Hermitian Hamilton operator, we consider initially the interplay of gain (acceptor) and loss (donor). Near singular points it causes fluctuations of the cross section which appear without any excitation of internal degrees of freedom of the system. This process occurs therefore very quickly and with high efficiency. We then consider the excitation of resonance states of the system by means of these fluctuations. This second step of the whole process takes place much slower than the first one, because it involves the excitation of internal degrees of freedom of the system. The two-step process as a whole is highly efficient, and the decay is biexponential. We provide, if possible, the results of analytical studies, otherwise characteristic numerical results. The similarities of the obtained results to light harvesting in photosynthetic organisms are discussed.en_US
dc.publisherAmerican Physical Societyen_US
dc.subjectBio Molecular Dynamicsen_US
dc.subjectBiomolecular Interactionsen_US
dc.subjectBiomolecular Processesen_US
dc.titleQuantum Systemsen_US

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