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

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[11p-E311-4] Development of a vibration isolation stage for a Pr³⁺:Y₂SiO₅ quantum memory

〇(M1)Naruki Okamura¹, Daisuke Yoshida^2,3, Koji Nagano³, Naoyoshi Seshuyama¹, Akira Ozawa^1,2, Tomoyuki Horikiri^1,2 (1.Grad. Sch. Eng., Yokohama Natl. Univ., 2.IMS, Yokohama Natl. Univ., 3.LQUOM Inc.)

Keywords:

Quantum memory,Atomic frequency comb,Vibration isolation

In atomic frequency comb quantum memories using Pr³⁺:Y₂SiO₅ crystals, cryostat-induced vibrations cause periodic linewidth broadening via the piezo-spectroscopic effect. To establish a stable experimental environment under cryogenic conditions, we developed a passive vibration isolation stage using an inverted pendulum structure. The mechanical displacement of the isolated platform was evaluated using a Michelson interferometer. Additionally, the spectroscopic stability of the antiholes was analyzed via heterodyne-detected free induction decay measurements. The results demonstrated that a consistent antihole linewidth was maintained on the stage by effectively suppressing periodic broadening synchronized with the cryostat cycle. This stability enables asynchronous write/read operations without strict trigger synchronization. We will also report on the verification of atomic frequency combs with narrower tooth spacing and experiments using weak coherent pulses.