26th Australian Institute of Physics Congress and the Australian and New Zealand Conference on Optics and Photonics

Noise induced by time dependent feedback in atomic clocks

Not scheduled

20m

Belinda Hutchinson Building (The University of Sydney )

Contributed Oral ANZOS | Quantum and Atom Optics (ANZCOP QAO)

Description

While the fundamental limits to atomic clock stability resulting from measurement noise are by now well understood, the limits imposed by the feedback mechanism itself have received only a relatively fragmented treatment.
Here we develop a general description of noise in atomic clocks that arises whenever the feedback is time dependent, i.e. in violation of the assumptions of linear time invariant control.
Our framework unifies and generalises the Dick effect that arises due to dead time during clock interrogation, and the intermodulation effect that occurs in clocks interrogated via modulation spectroscopy.