Non-classicality of the molecular vibrations assisting exciton energy transfer at room temperature.
Non-classicality of the molecular vibrations assisting exciton energy transfer at room temperature.
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DOI：
10.1038/ncomms4012
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发表时间：
2014
影响因子：
16.6
通讯作者：
Olaya-Castro, Alexandra
中科院分区：
文献类型：
--
作者：
O'Reilly, Edward J.;Olaya-Castro, Alexandra
在生物学中推进光引发反应中的量子效应的争论需要清楚地识别这些过程可以展示和利用的非经典特征。在这里，我们表明，在各种光合天线中存在的原型二聚体中，在亚皮秒时间尺度和室温下，有效的振动辅助能量传递可以体现并受益于集体色素运动的非经典波动。初始热化振动的非经典性是通过相干激振相互作用引起的，并且通过与电子动力学耦合的有效集体模式的相空间准概率分布中的负值明确表示。这些量子效应可以在激发的非相干输入上产生。因此，我们的研究结果表明，研究振动运动的非经典性质有助于激发和电荷输运、光接受和化学传感过程，可以成为揭示非平凡量子现象在生物学中的作用的试金石。理解量子效应在生物系统中可能扮演的角色需要识别它们的非经典特征。在这里，作者研究了光合天线中的原型二聚体，发现振动辅助过程受益于它们集体运动的非经典波动。
Advancing the debate on quantum effects in light-initiated reactions in biology requires clear identification of non-classical features that these processes can exhibit and utilize. Here we show that in prototype dimers present in a variety of photosynthetic antennae, efficient vibration-assisted energy transfer in the sub-picosecond timescale and at room temperature can manifest and benefit from non-classical fluctuations of collective pigment motions. Non-classicality of initially thermalized vibrations is induced via coherent exciton–vibration interactions and is unambiguously indicated by negativities in the phase–space quasi-probability distribution of the effective collective mode coupled to the electronic dynamics. These quantum effects can be prompted upon incoherent input of excitation. Our results therefore suggest that investigation of the non-classical properties of vibrational motions assisting excitation and charge transport, photoreception and chemical sensing processes could be a touchstone for revealing a role for non-trivial quantum phenomena in biology. Understanding the possible role of quantum effects in biological systems requires identification of their non-classical features. Here, the authors study prototype dimers in photosynthetic antennae and find that vibration-assisted processes benefit from non-classical fluctuations of their collective motions.
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DOI：
10.1073/pnas.1212666110
发表时间：
2013-02-19
影响因子：
11.1
作者：
Dorfman, Konstantin E.;Voronine, Dmitri V.;Scully, Marlan O.
通讯作者：
Scully, Marlan O.
影响因子：
3.3
作者：
Cavaliere, F.;Piovano, G.;Sassetti, M.
通讯作者：
Sassetti, M.
影响因子：
3.3
作者：
Fassioli, Francesca;Olaya-Castro, Alexandra
通讯作者：
Olaya-Castro, Alexandra
影响因子：
2.9
作者：
Kiesel, T.;Vogel, W.;Zavatta, A.
通讯作者：
Zavatta, A.
影响因子：
3.3
作者：
Calhoun, Tessa R.;Ginsberg, Naomi S.;Fleming, Graham R.
通讯作者：
Fleming, Graham R.