Fig. 4: Fringe-hops and interrogation time.
From: Prospects and challenges for squeezing-enhanced optical atomic clocks
Comparison between the safe interrogation times TFH (without fringe-hops) and the point of intersection for minimal instability as a function of laser coherence time Z and dead time TD. Based on this study we can identify regions in which the minimum between Dick effect and CTL can be safely reached (blue) and regions in which additionally the occurrence of fringe-hops has to be investigated in detail (red). By comparing N = 10, 100, and 1000 one finds that the red region is largest for small ensembles, short coherence times and larger dead times and decreases in size with increased particle numbers.
