Nonlinear Feedforward enabling Nonlinear Quadrature Measurement toward Fault-tolerant Universal Quantum Computation
Atsushi Sakguchi, Shunya Konno, Fumiya Hanamura, Hisashi Ogawa, Kan Takase, Warit Asavanant, Petr Marek, Radim Filip, Jun–ichi Yoshikawa, Hidehiro Yonezawa, Elanor H. Huntington, Akira Furusawa · Frontiers in Optics + Laser Science 2021 · 2021
We demonstrate nonlinear feedforward combined with non-Gaussian ancillae localized in time, which realizes nonlinear quadrature measurement. Our technology in principle enables fault-tolerant universal quantum computation by improving prepared ancillae.