Introducing internal-state transitions simultaneously on each branch of a light-pulse atom interferometer, we propose a scheme that is concurrently sensitive to both violations of the universality of free fall and gravitational redshift, two premises of general relativity. In contrast to redshift tests with quantum clocks, a superposition of internal states is not necessary but merely transitions between them, leading to a generalized concept of clocks in this context. The experimental realization seems feasible with already demonstrated techniques.

中文翻译：

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引力红移和自由落体普遍性的原子干涉测试

在光脉冲原子干涉仪的每个分支上同时引入内部状态跃迁，我们提出了一种方案，该方案同时对自由落体通用性和引力红移的违反（这是广义相对论的两个前提）同时敏感。与使用量子时钟的红移测试相反，内部状态的叠加不是必需的，而仅需在它们之间进行转换，从而在这种情况下产生了时钟的广义概念。利用已经证明的技术，实验实现似乎是可行的。