arXiv subjects

Y. N. Zuo

Publications and source records attributed to Y. N. Zuo.

2 recordsLinked to original sources

arXiv2019

Direct temperature determination of a sympathetically cooled large 113Cd+ ion crystal for a microwave clock

This paper reports the direct temperature determination of sympathetically cooled 113Cd+ ions with laser-cooled 24Mg+ in a linear Paul trap. The sympathetically cooled ion species distribute in the outer shell of the large ensembles, which contain up to 3.3E5 ions. With optimized parameters, the minimum temperature of the sympathetically cooled 113Cd+ ions was measured to be tens of mK. These results indicate promising performance for microwave atomic clocks. The second order Doppler frequency shift is two orders of magnitudes lower and the Dick effect is suppressed.

physics.atom-ph↗

arXiv2017

Suppression of Dick Effect in the Ramsey-CPT atomic clock by Interleaving Lock

For most passive atomic clocks, the Dick effect is one of the main limits to reach its frequency stability limitation due to quantum projection noise. In this paper, we demonstrate that the minimization of the Dick effect for the Ramsey-CPT atomic clock can be accomplished by interleaving lock. By optimizing the duty circle of laser pulses, averaging time during detection and optical intensity of laser beam, the Dick effect induced Allan deviation can be reduced to the level of 10^-14.

physics.ins-det↗