49 citations · 161 across the 10 of their papers we have counts for
11 papers
Three-dimensional Micromotion Compensation Protocols for an RF Ion Trap
Ryoichi Saito, Takashi Mukaiyama
We propose and demonstrate four procedures for three-dimensional micromotion compensation by combining two methods: the RF-photon correlation method and the displacement method bas…
Cancellation of phonon hopping in trapped ions by modulation of the trap potential
Takanori Nishi, Kaoru Yamanouchi, Ryoichi Saito +1
The local modes of trapped ions can be used to construct an analog quantum simulator and a digital quantum computer. However, the control of the phonon hopping remains difficult be…
Determination of principal axes orientation in an ion trap using matter-wave interference
Ryoichi Saito, Takashi Mukaiyama
We investigate the control mechanism of trap frequencies and determine the orientation of ion trap principal axes. The application of DC voltage to the ground electrodes, commonly…
Sensing Aharonov--Bohm phase using a multiply-orbiting-ion interferometer
Ryoichi Saito, Takashi Mukaiyama
Interferometers, which are built using spatially propagating light or matter waves, are commonly used to measure physical quantities. These measurements are made possible by exploi…
Development of a 671 nm injection-locked CW Ti:sapphire laser
Yoko Yamamoto, Ryoichi Saito, Takashi Mukaiyama
We developed an injection-locked Ti:sapphire laser at a wavelength of 671 nm where the fluorescence gain of the Ti:sapphire crystal is quite low. We obtained an output of more than…
Generation of a single ion large oscillator
Ryoichi Saito, Takashi Mukaiyama
We demonstrate the generation of a trapped ion oscillator having large oscillation amplitude of . Applying an offset voltage to the ion trap electrode helped achieve…
Measurement of ion displacement via RF power variation for excess micromotion compensation
Ryoichi Saito, Kota Saito, Takashi Mukaiyama
We demonstrate a method of micromotion minimization of a trapped ion in a linear Paul trap based on the precision measurement of the ion trapping position displacement due to a str…
Three-dimensional matter-wave interferometry of a trapped single ion
Ami Shinjo, Masato Baba, Koya Higashiyama +2
We report on a demonstration of Ramsey interferometry by three-dimensional motion with a trapped ion. We applied a momentum kick to the ion in a direction diagonal to…
Cooling dynamics of a single trapped ion via elastic collisions with small-mass atoms
Shinsuke Haze, Mizuki Sasakawa, Ryoichi Saito +2
We demonstrated sympathetic cooling of a single ion in a buffer gas of ultracold atoms with small mass. Efficient collisional cooling was realized by suppressing collision-induced…
Characterization of charge-exchange collisions between ultracold atoms and ions
R. Saito, S. Haze, M. Sasakawa +5
We investigate the energy dependence and the internal-state dependence of the charge-exchange collision cross sections in a mixture of Li atoms and Ca ions in the co…
Charge-exchange collisions between ultracold fermionic lithium atoms and calcium ions
Shinsuke Haze, Ryoichi Saito, Munekazu Fujinaga +1
Charge exchange collisions between ultracold fermionic 6Li atoms and 40Ca+ ions are observed in the mK temperature range. The reaction product of the charge exchange collision is i…