[11p-E311-1~11] 3.9 Optical quantum physics and technologies

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[11p-E311-5] Suppression of efficiency oscillations in rare-earth-doped quantum memory by compensation of external magnetic fields

〇(M2)Kota Sasaki¹, Haruto Miyazaki², Yudai Nodaguchi², Naoyoshi Seshuyama², Ryoma Komatsudaira², Koji Nagano⁴, Daisuke Yoshida^3,4, Feng-Lei Hong^2,3, Akira Ozawa^2,3, Tomoyuki Horikiri^2,3,4 (1.IFGS, Yokohama Natl. Univ., 2.Grad. Sch. Eng., Yokohama Natl. Univ., 3.IMS, Yokohama Natl. Univ., 4.LQUOM Inc.)

Keywords:

quantum memory,rare-earth-ion-doped crystal

In an Atomic Frequency Comb-based quantum memory using a rare-earth-ion-doped crystal, temporal oscillations in the storage efficiency under Dynamical Decoupling sequences had been a key challenge. In this work, we constructed a three-axis coil system for external magnetic field compensation, and successfully reduced the storage efficiency oscillations by suppressing spin-level splitting and interference caused by the external magnetic fields. We report the details of the magnetic field compensation system and the magnetic field dependence of the efficiency oscillations.