We determined the optical profiles of a molecular system coupled with a thermal bath in presence of intramolecular coupling. Solvent effects were explicitly considered as a random variable by modelling the non-radiative interaction with the solute. Optical susceptibilities of stochastic origin were solved through cumulant expansions in Gaussian distributions considering a white noise as a correlation function. We examined the behaviour of these properties for the solvent noise parameter and intramolecular coupling parameters. Our results show that the intensity of the nonlinear optical properties decreases with the insertion of either of the two effects considered. Finally, other considerations related to the determination of relaxation times from the symmetry properties of the optical responses in frequency space are presented.

我们确定了在存在分子内耦合的情况下与热浴耦合的分子系统的光学剖面。通过模拟与溶质的非辐射相互作用，溶剂效应被明确视为随机变量。考虑到白噪声作为相关函数，通过高斯分布中的累积量展开来解决随机起源的光学敏感性。我们针对溶剂噪声参数和分子内耦合参数检查了这些特性的行为。我们的结果表明，非线性光学特性的强度随着所考虑的两种效应中的任何一种的插入而降低。最后，介绍了与根据频率空间中光学响应的​​对称特性确定弛豫时间相关的其他考虑因素。