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

Abstract

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.

arXiv comment5 pages, 5 figures

References in corpus (9)

• Observation of a Many-Body Dynamical Phase Transition with a 53-Qubit Quantum Simulator
• Single-Ion Atomic Clock with $3\times 10^{-18}$ Systematic Uncertainty
• Improved limit on a temporal variation of $m_p/m_e$ from comparisons of Yb${}^{+}$ and Cs atomic clocks
• Probing QED and fundamental constants through laser spectroscopy of vibrational transitions in HD+
• Sympathetic ground state cooling and time-dilation shifts in an ${}^{27}{\text{Al}}^{+}$ optical clock
• Translational cooling and storage of protonated proteins in an ion trap at subkelvin temperatures
• Sub-milliKelvin spatial thermometry of a single Doppler cooled ion in a Paul trap
• Precision lifetime measurements of a single trapped ion with ultrafast laser pulses
• Coulomb crystal mass spectrometry in a digital ion trap

Cited by in corpus (4)

• Roles of electron correlation effects for accurate determination of $g_j$ factors of low-lying states of ${}^{113}$Cd${}^{+}$ and their applications to atomic clock
• Second-order Doppler frequency shifts of trapped ions in a linear Paul trap
• Sympathetic cooling of a large ${}^{113}{\mathrm{Cd}}^{+}$ ion crystal with ${}^{40}{\mathrm{Ca}}^{+}$ in a linear Paul trap
• Determination of hyperfine splittings and Landé $g_J$ factors of $5s{}^2{S}_{1/2}$ and $5p{}^2{P}_{1/2,3/2}$ states of ${}^{111,113}$Cd${}^{+}$ for a microwave frequency standard