The 27th International Conference on Atomic Physics

Progress on the development of Ca+ optical clocks

Not scheduled

1h 30m

Abstract of recent or ongoing work (by remote / virtual participant) Trapped ions, Rydberg atoms, and cold plasmas Abstracts by remote participants

Description

Here the recent progress on the $\rm{Ca}^{+}$ ion optical clocks will be reported: including a cryogenic $\rm{Ca}^{+}$ ion clock at the liquid nitrogen environment with evaluated uncertainty of 3E-18, and a transportable $\rm{Ca}^{+}$ ion clock with uncertainty of 1.3E-17 and an uptime of ~85% in a month. the clock stability is greatly improved, with long term stability reaching the E-18 level. The absolute frequency measurement of the clock transition was recently made, with a total uncertainty of 2.8E-16, this is a factor of 2 improvement comparing to the measurement in 2020. We will also discuss the possibility of making a transportable, room-temperature-based $\rm{Ca}^{+}$ ion clocks, with uncertainty at the E-18 level, and also give the prospect on the possible future applications.