[17p-S4_203-1~12] 3.9 Optical quantum physics and technologies

3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[17p-S4_203-5] Pulse Homodyne Measurement with High-Repetition Squeezed Light using Optical Parametric Amplifier

〇(B)Toshinori Yamazaki¹, Yoshitsugu Hoshino¹, Kazuma Takahashi¹, Oizumi Kan¹, Kazuki Hirota¹, Katsuki Nakashima¹, Takaya Hoshi¹, Takumi Suzuki¹, Takahiro Kashiwazaki², Taichi Yamashima², Asuka Inoue², Takeshi Umeki², Mamoru Endo^1,3, Akira Furusawa^1,3,4 (1.The Univ. of Tokyo, 2.NTT Device Technology Labs, 3.RIKEN RQC, 4.OptQC)

Keywords:

optical quantum state generation,optical parametric amplification,pulsed homodyne mesurenment

Balanced homodyne detection is a key technique for measuring optical quadratures in continuous-variable quantum information processing, and increasing its speed is essential for high-speed quantum computation. Recently, pulsed optical schemes have gained attention due to their advantages in quantum state generation and measurement. However, the repetition rate of conventional pulsed homodyne detection is limited to the MHz range by the bandwidth of electronic detection systems.To overcome this limitation, phase-sensitive amplification using an optical parametric amplifier has been proposed. Pre-amplification by an OPA enables broadband detection while maintaining tolerance to optical loss. In this work, we generated pulsed squeezed light at a repetition rate of 2.5 GHz and demonstrated PSA-based pulsed homodyne detection.