Experimental universal gate set operation on cat qubits in a Kerr Parametric Oscillator

We present our experimental results on implementation of universal gate set operation on cat states encoding. These cat states are generated in two-dimensional superconducting Kerr Parametric Oscillators (KPOs). X- and Z-gates are implemented by manipulating the strength of the microwave drive and its detuning. Numerical optimization technics are applied to improve the gate fidelity, which is estimated using quantum process tomography. We also show some preliminary results of two-KPO gate operation. This work will be the first step towards realization of a universal quantum computing platform made of a nonlinear oscillator network [1].

[1] Hayato Goto, Universal quantum computation with a nonlinear oscillator network, Phys. Rev. A 93, 050301(2016)