In this paper, we investigate the effects of gravitational field on the dynamical behaviour of nonlinear atom–field interaction. We consider a moving tripod-type four-level atom interacting with a single mode field in the presence of a classical homogeneous gravitational field. The analytical solution of the model is calculated by using the Schrödinger equation for a coherent electromagnetic field and when the atom is in its excited state. The influence of the detuning parameter and the classical homogeneous gravitational field on the temporal behaviour of atomic inversion, Mandel Q-parameters, purity of the atomic system and concurrence is studied. Our proposal has many advantages over the previous optical schemes and can be realised in several multiple experiments, such as quantum gravity. The results show that the gravity parameter has an important effect on the properties of these phenomena. Finally, conclusions and some features and comments are given.

中文翻译：

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经典均质引力场存在下三脚架型四能级原子与单模场的相互作用

在本文中，我们研究了引力场对非线性原子场相互作用的动力学行为的影响。我们考虑在经典的均匀引力场存在下与单模场相互作用的移动三脚架型四能级原子。当原子处于激发态时，模型的解析解是通过使用薛定谔方程来计算相干电磁场的。研究了失谐参数和经典均匀引力场对原子反演的时间行为、曼德尔 Q 参数、原子系统纯度和并发性的影响。我们的提议比以前的光学方案有很多优点，可以在多个实验中实现，例如量子引力。结果表明，重力参数对这些现象的性质有重要影响。最后给出了结论和一些特点和评论。