Quantifying non-Markovianity for a chromophore-qubit pair in a super-Ohmic bath

• Main Authors: Liu, Jing, Sun, Kewei, Wang, Xiaoguang, Zhao, Yang
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2015
• Subjects: DRNTU::Science::Physics::Atomic physics::Quantum theory
• Online Access: https://hdl.handle.net/10356/106709; http://hdl.handle.net/10220/25128
• Institution: Nanyang Technological University

An approach based on a non-Markovian time-convolutionless polaron master equation is used to probe the quantum dynamics of a chromophore-qubit in a super-Ohmic bath. Utilizing a measure of non-Markovianity based on dynamical fixed points, we study the effects of the environment temperature and the coupling strength on the non-Markovian behavior of the chromophore in a super-Ohmic bath. It is found that an increase in the temperature results in a reduction in the backflow information from the environment to the chromophore, and therefore, a suppression of non-Markovianity. In the weak coupling regime, increasing coupling strength will enhance the non-Markovianity, while the effect is reversed in the strong coupling regime.