arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1304.7834physics.bio-phcond-mat.mes-hallquant-ph
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光合复合体中噪声辅助的量子电子转移

Noise-assisted quantum electron transfer in photosynthetic complexes

Alexander I. Nesterov, Gennady P. Berman, José Manuel Sánchez Martínez, Richard T. Sayre

摘要:

初级电子供体和受体之间的电子转移(ET)在光系统II反应中心(RC)中建模。我们的模型包括(i)两个离散的能级与施主和受主,通过偶极型矩阵元素相互作用和(ii)两个连续流形的电子能级(“汇”),直接与施主和受主相互作用。也就是说,施主和受主的两个分立的能级通过相应的相互作用矩阵元嵌入到它们各自独立的阱中。我们还介绍了经典的(外部)噪声,同时作用于施主和受主(集体相互作用)。我们推导出一个封闭的积分微分方程系统,它描述了非马尔可夫量子动力学的ET。一个区域的参数中,ET动力学可以被简化,并描述耦合常微分方程。使用这些简化的方程,尖锐和平坦的氧化还原电位进行了分析。我们分析和数值计算得到的特征参数,优化ET率和效率在这个系统中。

英文摘要:

Electron transfer (ET) between primary electron donors and acceptors is modeled in the photosystem II reaction center (RC). Our model includes (i) two discrete energy levels associated with donor and acceptor, interacting through a dipole-type matrix element and (ii) two continuum manifolds of electron energy levels ("sinks"), which interact directly with the donor and acceptor. Namely, two discrete energy levels of the donor and acceptor are embedded in their independent sinks through the corresponding interaction matrix elements. We also introduce classical (external) noise which acts simultaneously on the donor and acceptor (collective interaction). We derive a closed system of integro-differential equations which describes the non-Markovian quantum dynamics of the ET. A region of parameters is found in which the ET dynamics can be simplified, and described by coupled ordinary differential equations. Using these simplified equations, both sharp and flat redox potentials are analyzed. We analytically and numerically obtain the characteristic parameters that optimize the ET rates and efficiency in this system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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