Four-photon subtraction from picosecond squeezed vacuum demonstrating Wigner negativity without loss correction
Mamoru Endo, Takefumi Nomura, Tatsuki Sonoyama, Kazuma Takahashi, Sachiko Takasu, Daiji Fukuda, Takahiro Kashiwazaki, Asuka Inoue, Takeshi Umeki, Rajveer Nehra, Petr Marek, Radim Filip, Kan Takase, Warit Asavanant, Akira Furusawa