Generation and Detection of discrete- and continuous-variable quantum states

Yi-Ru Chen^1*, Ying-Hsun Huang¹, Yao-Chin Huang¹, Chien-Ming Wu¹, Ray-Kuang Lee^1,2,3

¹Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan
²Physics Division, National Center for Theoretical Sciences, Hsinchu, Taiwan
³Center for Center for Quantum Technology, National Tsing Hua University, Hsinchu, Taiwan

* Presenter:Yi-Ru Chen, email:eunice298123@gmail.com

We report our implementations of discrete- and continuous-variable quantum
states, i.e., the single photon and squeezed states, respectively. With the Hanbury Brown and Twiss (HBT) interferometer for the heralding single photon, the second-order auto-correlation function is measured as low as g(2) (0) = 0.0392 at the heralding rate 196 kHz; while with the balanced homodyne detection (BHD), a noise reduction up to 10 dB is measured for the squeezed vacuum states. By combining these two families together, illustrations on the generation and manipulations of hybrid states with discrete- and continuous-variable quantum states will be demonstrated.

Keywords: Quantum Optics, Squeezed light, Heralded Single Photon Source, Balanced Homodyne Detection, Hanbury Brown and Twiss (HBT) interferometer