Accession Number:

AD1084649

Title:

Demonstration of Robust Quantum Gate Tomography Via Randomized Benchmarking

Descriptive Note:

Journal Article - Open Access

Corporate Author:

Raytheon BBN Technologies Cambridge United States

Report Date:

2015-11-05

Pagination or Media Count:

12.0

Abstract:

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 RB.

Subject Categories:

  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE