Construction of controlled-NOT gate based on microwave-activated phase (MAP) gate in two transmon system

Abstract

Abstract We experimentally constructed an all-microwave scheme for the controlled-NOT (cNOT) gate between two superconducting transmon qubits in a three dimensional cavity. Our cNOT gate is based on the microwave-activated phase (MAP) gate, which requires an additional procedure to compensate the accumulated phases during the operation of the MAP gate. We applied Z-axis phase gates using microwave hyperbolic secant pulse on both qubits with adequate rotation angles systematically calibrated by separate measurements. We evaluated the gate performance of the constructed cNOT gate by performing two-qubit quantum process tomography (QPT). Finally, we present the experimental implementation of the Deutsch-Jozsa algorithm using the cNOT gate.

Keywords

• CNOT Gate
• Deutsch-Jozsa Algorithm
• Hyperbolic Secant Pulse
• Transmon Qubit
• Process Fidelity