[10a-N202-1~8] 3.9 Optical quantum physics and technologies

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[10a-N202-4] Continuous-wave homodyne measurement of an superposition of vacume and single photon state generated by pulsed light

〇Kan Oizumi¹, Katsuki Nakashima¹, Lucas Aoyagi², Tatsuki Sonoyama^1,3,4, Kazuma Takahashi¹, Takumi Suzuki¹, Takahiro Kashiwazaki4⁵, Taichi Yamashima⁵, Asuka Inoue⁵, Takeshi Umeki⁵, Shigehito Miki⁶, Hirotaka Terai⁶, Masahiro Yabuno⁶, Mamoru Endo^1,4, Akira Furusawa^1,3,4 (1.Univ. of Tokyo, 2.Laboratoire Kastler Brossel, 3.OptQC, 4.Riken RQC, 5.NTT Device Technology Labs, 6.NICT)

Keywords:

generation of quantum states,homodyne measurement,pulsed light

Non-Gaussian gates are essential for universal optical quantum computing. To realize these gates, we have been developing a hybrid method. This approach involves generating quantum states with pulsed light and measuring them with continuous-wave (CW) light. In this work, we employed this method to generate phase-sensitive photon-number superposition states. Under precise phase control between the pulsed and CW light, we demonstrated the generation of a quantum state with a short temporal wave packet of 80 ps. This result indicates that our approach is applicable to the generation of even more complex quantum states.