Vibration-assisted coherent excitation energy transfer in a detuned dimer
The important role of high-energy intramolecular vibrational modes for excitation energy transfer in the detuned photosynthetic systems is studied. Based on a basic dimer model which consists of two two-level systems （pigments） coupled to high-energy vibrational modes, we find that the high-energy i...
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| Published in | Chinese physics B Vol. 26; no. 3; pp. 465 - 473 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.03.2017
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| Online Access | Get full text |
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| Summary: | The important role of high-energy intramolecular vibrational modes for excitation energy transfer in the detuned photosynthetic systems is studied. Based on a basic dimer model which consists of two two-level systems （pigments） coupled to high-energy vibrational modes, we find that the high-energy intramolecular vibrational modes can enhance the energy transfer with new coherent transfer channels being opened when the phonon energy matches the detuning between the two pigments. As a result, the energy can be effectively transferred into the acceptor. The effective Hamiltonian is obtained to reveal the strong coherent energy exchange among the donor, the acceptor, and the high-energy intramolecular. A semi-classical explanation of the phonon-assisted mechanism is also shown. |
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| Bibliography: | The important role of high-energy intramolecular vibrational modes for excitation energy transfer in the detuned photosynthetic systems is studied. Based on a basic dimer model which consists of two two-level systems （pigments） coupled to high-energy vibrational modes, we find that the high-energy intramolecular vibrational modes can enhance the energy transfer with new coherent transfer channels being opened when the phonon energy matches the detuning between the two pigments. As a result, the energy can be effectively transferred into the acceptor. The effective Hamiltonian is obtained to reveal the strong coherent energy exchange among the donor, the acceptor, and the high-energy intramolecular. A semi-classical explanation of the phonon-assisted mechanism is also shown. Xin Wang1,2, Hao Chen1, Chen-yu Li1, and Hong-rong Li1,2（1 School of Science, Xi＇an Jiaotong University, Xi＇an 710049, China 2 CEMS, RIKEN, Wako-shi, Saitama 351-0198, Japan） excitation energy transfer, high-energy intramolecular vibrational motion, dynamically resonantcoherent transfer 11-5639/O4 |
| ISSN: | 1674-1056 2058-3834 |
| DOI: | 10.1088/1674-1056/26/3/037105 |