G. L. Celardo, F. Borgonovi, M. Merkli, V. I. Tsifrinovich, G. P. Berman
We investigate the role of long-lasting quantum coherence in the efficiency of energy transport at room temperature in Fenna-Matthews-Olson photosynthetic complexes. The dissipation due to the coupling of the complex to a reaction center is analyzed using an effective non-Hermitian Hamiltonian. We show that, as the coupling to the reaction center is varied, the maximum efficiency in energy transport is achieved at the superradiance transition, characterized by a segregation of the imaginary parts of the eigenvalues of the effective non-Hermitian Hamiltonian. This approach allows one to study various couplings to the reaction center. We show that the maximal efficiency at room temperature is sensitive to the coupling of the system to the reaction center.
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http://arxiv.org/abs/1111.5443
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