TY - JOUR T1 - Demonstration of Robust Quantum Gate Tomography via Randomized Benchmarking JF - New Journal of Physics Y1 - 2015 A1 - Blake R. Johnson A1 - Marcus P. da Silva A1 - Colm A. Ryan A1 - Shelby Kimmel A1 - Jerry M. Chow A1 - Thomas A. Ohki AB - Typical quantum gate tomography protocols struggle with a self-consistency problem: the gate operation cannot be reconstructed without knowledge of the initial state and final measurement, but such knowledge cannot be obtained without well-characterized gates. A recently proposed technique, known as randomized benchmarking tomography (RBT), sidesteps this self-consistency problem by designing experiments to be insensitive to preparation and measurement imperfections. We implement this proposal in a superconducting qubit system, using a number of experimental improvements including implementing each of the elements of the Clifford group in single `atomic' pulses and custom control hardware to enable large overhead protocols. We show a robust reconstruction of several single-qubit quantum gates, including a unitary outside the Clifford group. We demonstrate that RBT yields physical gate reconstructions that are consistent with fidelities obtained by randomized benchmarking. VL - 17 U4 - 113019 UR - http://arxiv.org/abs/1505.06686 CP - 11 U5 - 10.1088/1367-2630/17/11/113019 ER -