[16p-A405-1~15] 3.9 Optical quantum physics and technologies (formerly 3.10)

△ [16p-A405-6] Over 40 GHz bandwidth real-time amplitude measurement of 5 dB squeezed light by optical phase sensitive pre-amplification

〇ASUKA INOUE¹, TAKAHIRO KASHIWAZAKI¹, TAICHI YAMASHIMA², NAOTO TAKANASHI², TAKUSHI KAZAMA¹, KOJI ENBUTSU¹, KEI WATANABE¹, TAKESHI UMEKI¹, MAMORU ENDO^2,3, AKIRA FURUSAWA^2,3 (1.NTT, 2.Univ. of Tokyo, 3.RIKEN RQC)

Keywords:quantum optics, optical phase amplification, homodyne detection

We have proposed a broadband quadrature phase-amplitude measurement using an optical phase-sensitive amplifier and a high-speed optical communication detector for the realization of a high-speed optical quantum computer. In this study, we succeeded in the real-time quadrature phase amplitude measurement of 5 dB squeezing at 43 GHz bandwidth for the first time in the world. This technology accelerates the marriage of high-speed optical communication technology represented by 5G technology and optical quantum technology, and induces a paradigm shift in the research and development of optical quantum computers.