[23a-A601-1~9] 3.9 Optical quantum physics and technologies (formerly 3.10)

9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[23a-A601-2] Generation and observation of broadband optical entangled states with 5G technologies

〇(DC)Akito Kawasaki¹, Hector Brunel^2,1, Ryuho Ide¹, Takumi Suzuki¹, Kashiwazaki Takahiro³, Inoue Asuka³, Takeshi Umeki³, Taichi Yamashima¹, Kan Takase^1,4, Mamoru Endo^1,4, Atsushi Sakaguchi⁴, Warit Asavanant^1,4, Akira Furusawa^1,4 (1.The Univ. of Tokyo, 2.ENS, 3.NTT device technology labs, 4.Riken RQC)

Keywords:

Quantum Computation,entanglement,optical communication

The bandwidth of optical quantum information processing system with carrier frequency of several hundred THz are limited to several hundred MHz by homodyne (HD) detection that read out quantum information. In these days, HD instruments with tens of GHz bandwidth have been developed using 5G technologies, however their efficiency is low and it is difficult to apply them to loss-sensitive quantum light . In this research, we improve the loss tolerance of quantum light by using optical amplification and generate and verify 70 GHz-band quantum entangled states using a 5G homodyne detector.