Yuichi Ohtomo

Search for electric dipole moment in 129Xe atom using a nuclear spin oscillator

We aim to measure the electric dipole moment (EDM) of a diamagnetic atom 129Xe using an optical-detection nuclear spin maser technique. The relation of EDM in a diamagnetic atom to nuclear Schiff moment and fundamental sources generating it is discussed, and the present status for the development of our experimental setup is presented.

Development of co-located 129 Xe and 131 Xe nuclear spin masers with external feedback scheme

We report on the operation of co-located Xe and Xe nuclear spin masers with an external feedback scheme, and discuss the use of Xe as a comagnetometer in measurements of the Xe spin precession frequency. By applying a correction based on the observed change in the Xe frequency, the frequency instability due to magnetic field and cell temperature drifts are eliminated by two orders of magnitude. The frequency precision of 6.2 μHz is obtained for a 10 s averaging time, suggesting the possibility of future improvement to ≈ 1 nHz by improving the signal-to-noise ratio of the observation.

Development Of 131Xe Co-magnetometry For Xe Atomic EDM Search

Co-magnetometry enables the elimination of systematic errors arising from the long-term drift in the magnetic field, and is essential for a precision measurement of spin precession frequency in experiments searching for electric dipole moment (EDM).

Development of high-homogeneity magnetic field coil for 129Xe EDM experiment

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Active nuclear spin maser oscillation with double cell

Xe nuclear spin maser shows great promise as a co-magnetometer in a Xe EDM experiment, because the systematic error originating from the Xe-Rb interaction, which virtually limits the sensitivity in a case of a

Search for electric dipole moment in 129Xe atom using active nuclear spin maser

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Nuclear spin maser and experimental search for 129Xe atomic EDM

He co-magnetometer, will be cancelled out. The performance of a cell which contains both

Double-Cell Geometry for 129Xe/3He Co-Magnetometry

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EDM measurement in 129Xe atom using dual active feedback nuclear spin maser

Xe and

Development of a high intensity laser for efficient spin exchange optical pumping in a spin maser measurement of the 129Xe EDM

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