High-On-Off-Ratio Beam-Splitter Interaction for Gates on Bosonically Encoded Qubits
Benjamin J. Chapman, Stijn J. de Graaf, Sophia H. Xue, Yaxing Zhang, James D. Teoh, Jacob C. Curtis, Takahiro Tsunoda, Alec Eickbusch, Alexander P. Read, Akshay Koottandavida, Shantanu Mundhada, Luigi Frunzio, Michel Devoret, S. M. Girvin, Robert J. Schoelkopf · PRX Quantum · 2023
A SNAIL-based coupler is used to devise a programmable beam splitter interaction between two bosonic modes with over an octave separation in frequency; the method is further applied as a primitive for constructing two-qubit bosonic gates.