论文标题
横向振动对通过聚合物链传输的关键作用
Crucial effect of transverse vibrations on the transport through polymer chains
论文作者
论文摘要
电子的低温转运，或振动或电子激子向聚合物链的低温转运对其与横向声振动的相互作用非常敏感。我们表明，这种相互作用会导致实质性的极化效应和破坏性，通常比与纵向振动相关的相关性更强。对于位点依赖性相互作用，横向声子形成了量子相变的横向音子，伴随着零温度下的传输和快速的脱位，其特征在于温度依赖温度的速率在低温下的三分之二的功率，而该速率的速率OIS与平方的温度不符相互作用。后一种依赖性用于解释对聚乙烯甘氨酸低聚物中温度依赖性振动能传输的最新测量。
The low temperature transport of electron, or vibrational or electronic exciton towards polymer chains turns out to be dramatically sensitive to its interaction with transverse acoustic vibrations. We show that this interaction leads to substantial polaron effect and decoherence, which are generally stronger than those associated with longitudinal vibrations. For site-dependent interactions transverse phonons form subohmic bath leading to the quantum phase transition accompanied by full suppression of the transport at zero temperature and fast decoherence characterized by temperature dependent rate of temperature to the power of two thirds at low temperature while this rate rate ois proportional to the squared temperature for site-independent interactions. The latter dependence was used to interpret recent measurements of temperature dependent vibrational energy transport in polyethylene glycol oligomers.
