Ozawa Akira, Davila-Rodriguez Josue, Hänsch Theodor W, Udem Thomas
Max-Planck-Institute of Quantum Optics, Hans-Kopfermann-Str. 1, D-85741, Garching, Germany.
Sci Rep. 2018 Jul 13;8(1):10643. doi: 10.1038/s41598-018-28824-w.
The quantum Zeno effect (QZE) is not only interesting as a manifestation of the counterintuitive behavior of quantum mechanics, but may also have practical applications. When a spectroscopy laser is applied to target atoms or ions prepared in an initial state, the Rabi flopping of an auxiliary transition sharing one common level can be inhibited. This effect is found to be strongly dependent on the detuning of the spectroscopy laser and offers a sensitive spectroscopy signal which allows for high precision spectroscopy of transitions with a small excitation rate. We demonstrate this method with direct frequency comb spectroscopy using the minute power of a single mode to drive a dipole allowed transition in a single trapped ion. Resolving the individual modes of the frequency comb demonstrates that the simple instantaneous quantum collapse description of the QZE can not be applied here, as these modes need several pulses to build up.
量子芝诺效应（QZE）不仅作为量子力学反直觉行为的一种表现形式而引人关注，而且可能具有实际应用价值。当将光谱激光应用于处于初始状态的目标原子或离子时，共享一个公共能级的辅助跃迁的拉比振荡可以被抑制。发现这种效应强烈依赖于光谱激光的失谐，并提供了一个灵敏的光谱信号，该信号允许对具有小激发率的跃迁进行高精度光谱分析。我们使用单模的微小功率来驱动单个囚禁离子中的偶极允许跃迁，通过直接频率梳光谱法演示了这种方法。对频率梳的各个模式进行分辨表明，QZE的简单瞬时量子坍缩描述在此处不适用，因为这些模式需要几个脉冲才能建立起来。
