We investigate the dependence of physical observable of open quantum systems with Bosonic bath on the bath correlation function. We provide an error estimate of the difference of physical observable induced by the variation of bath correlation function, based on diagrammatic and combinatorial arguments. This gives a mathematically rigorous justification of the result in [Mascherpa et al, Phys Rev Lett 2017].

翻译：我们研究了具有玻色子浴的开放量子系统的物理可观测量对浴关联函数的依赖性。基于图示和组合论证，我们给出了由浴关联函数变化引起的物理观测量差异的误差估计。这为[Mascherpa等人，Phys Rev Lett 2017]中的结果提供了数学上严格的证明。