An equivalence is made between the exceptional points proposed by the field of non-Hermitian quantum mechanics and the dead band observed in laser gyroscopes. The sensitivity enhancement near this exceptional point is plagued by increased uncertainty due to broadening of the beat-note bandwidth. Also, near the dead band the gyroscope response is caused by Rabi intensity oscillations and not solely by a phase modulation. Finally, a distinction is made between conservative and non-conservative coupling.

中文翻译：

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特殊点和环形激光陀螺仪

在非厄米量子力学领域提出的异常点与激光陀螺仪中观察到的死区之间进行了等效。由于拍音带宽的扩大，不确定性增加了这一异常点附近的灵敏度增强。此外，在死区附近，陀螺仪响应是由 Rabi 强度振荡引起的，而不仅仅是由相位调制引起的。最后，区分保守和非保守耦合。