Next Generation Optical Quantum State Synthesis: Observation of Fourfold Negativity in the Wigner Function
Mamoru Endo, Kan Takase, Takefumi Nomura, Tatsuki Sonoyama, Kazuma Takahashi, Takahiro Kashiwazaki, Asuka Inoue, Takeshi Umeki, Sachiko Takasu, Daiji Fukuda, Petr Marek, Radim Filip, Warit Asavanant, Akira Furusawa · 2024
An optical quantum state with fourfold Wigner negativity was generated without any loss correction. Generalized photon subtraction scheme, broadband squeezed light source, and high-temporal-resolution transition-edge sensor enabled generation rates of tens of counts per second.