Quantum Transport in Light-Harvesting Systems and Organic Semiconductors
讲座名称：
Quantum Transport in Light-Harvesting Systems and Organic Semiconductors
讲座时间：
2018-09-25
讲座人：
Jianshu Cao
形式：
校区：
兴庆校区
实践学分：
讲座内容：
报告题目：Quantum Transport in Light-Harvesting Systems and Organic Semiconductors
报告时间：2018年9月25日下午4:30
报告地点：中偀楼B253室
报告人：Prof. Jianshu Cao，Department of Chemistry, MIT
Abstract:
Quantum coherence is a key concept in physics and chemistry and will be discussed in the context of charge mobility/exciton diffusion in organic semiconductors and energy transfer in light-harvesting complexes.
I. Coherent quantum transport in disordered systems displays an optimal diffusion constant at an intermediate level of noise and temperature. [1] Detailed calculations indicate the crucial role of localization length in coherent transport and predict charge mobility close to experimental values. [2] Further, we have explored the subtle dependence of the diffusion constant on the dimensionality and shape of the sample and demonstrated the universal scaling of the 1D-2D transition in nanotubes. [3]
II. Forster energy transfer theory has been extended to multi-chromophoric (MC) systems by incorporating the correlation between exciton and its environments. This correlation leads to the rotation of the reduced density matrix and is fully counted in two recently- developed methods: numerically exact stochastic path integrals (SPI) [4] and theoretically self-consistent coherent potential approximation (CPA) [5]. Application of these methods demonstrates incoherent hopping in FMO [6] and coherent transfer in LH2 [7].
References:
1. Moix, Khasin, Cao, New Journal of Physics, 15, 085010 (2013)
2. Lee, Moix, Cao, J. Chem. Phys. 142, 164103 (2015)
3. Chuang, Lee, Moix, Knoester, and Cao, Phys. Rev. Lett. 116, 196803 (2016)
4. Moix, Ma, Cao, J. Chem. Phys. 142, p094108 (2015)
5. Chenu and Cao, Phys. Rev. Lett. 118, 013001 (2017)
6. Wu, Liu, Ma, Silbey, and Cao, J. Chem. Phys. 137, 174111 (2012); Moix, Wu, Huo,Coker, J. Cao, JPC Letts. 2, 3045 (2011)
7. Moix, Ma, and Cao, to be submitted (2018)
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