论文标题
双耦合自旋玻色子模型中的相干动力学
Coherent dynamics in a dual-coupling spin-boson model
论文作者
论文摘要
我们研究了对称双电势孔系统的基态粒子隧穿的动力学，在同时存在对角线和非对角线耦合与欧姆振荡器浴的情况下。我们使用非相互作用 - 薄片近似来研究生理温度下各种系统 - 环境耦合强度的相干效应。我们展示了非对角耦合机制的存在如何显着改变隧道粒子的动力学，尽管环境中有强烈的热波动，但仍会产生连贯的振荡。粒子极化以及隧道能量的波动都会导致对隧道粒子动力学的连贯性质的竞争影响，而非对抗耦合在原本不一致的环境下引入了相对长的示例振动模式。
We study the dynamics of a particle tunneling between the ground states of a symmetric double potential well system, in the presence of simultaneous diagonal and non-diagonal couplings to an Ohmic oscillator bath. We use the noninteracting-blip approximation to investigate coherence effects across a wide range of system-environment coupling strengths at physiological temperatures. We show how the presence of a non-diagonal coupling mechanism significantly alters the dynamics of the tunneling particle, producing coherent oscillations despite strong thermal fluctuations in the environment. Fluctuations in both the particle's polarization, as well as tunneling energies, lead to competing influences on the coherent nature of tunneling particle dynamics, with non-diagonal couplings introducing a relatively long-lived oscillatory mode in an otherwise incoherent setting.
