Farhat M, Kais S, Alharbi F H
Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar.
Department of Chemistry, Department of Physics and Birck Nanotechnology Center, Purdue University, West Lafayette, IN, 47907, USA.
Sci Rep. 2017 Nov 13;7(1):15468. doi: 10.1038/s41598-017-15185-z.
In this work, we report modeling of non-Markovian open quantum systems, consisting of an excitonic dimer that displays memory effect due to time delayed interaction with its environment. We, indeed investigate the effect of these time delays on quantum coherence and excitation dynamical behavior in the time domain generally considered for photosynthetic experiments (few hundred femtoseconds). In particular, we show that the coherence is maintained for periods proportional to time delays. Additionally, if delay is taken into account, coupling to the environment can be tuned to lower values, unlike in previous studies. This kind of intriguing effect can, therefore, when generalized to complete systems, permit more control on the experimental parameters, which may lead to more accurate description of the photosynthetic energy transfer functioning and subsequent applications in artificial photovoltaic research.
在这项工作中，我们报告了非马尔可夫开放量子系统的建模，该系统由一个激子二聚体组成，由于与其环境的时间延迟相互作用而表现出记忆效应。我们确实研究了这些时间延迟对通常在光合作用实验中考虑的时域（几百飞秒）内量子相干和激发动力学行为的影响。特别是，我们表明相干性在与时间延迟成比例的时间段内得以维持。此外，与先前的研究不同，如果考虑延迟，与环境的耦合可以调整到更低的值。因此，这种有趣的效应在推广到完整系统时，可以对实验参数进行更多控制，这可能会导致对光合作用能量转移功能的更准确描述以及随后在人工光伏研究中的应用。
