Work

Characterization of control in a superconducting qutrit using randomized benchmarking

Year: 2021

Type: article

Abstract: We characterize control of a qutrit implemented in the lowest three energy levels of a capacitively shunted flux-biased superconducting circuit.Randomized benchmarking over the qutrit Clifford group yields an average fidelity of 98.89 ± 0.05%.For a selected subset of the Clifford group, we perform quantum process tomography and observe the behavior of repeated gate sequences.Each qutrit gate is generated using only two-state rotations via a method applicable to any unitary.We find that errors are due primarily to decoherence and have a significant contribution from level shifts.This work demonstrates high-fidelity qutrit control and outlines avenues for future work on the optimal control of superconducting qudits.

Source: Physical Review Research

DOI: 10.1103/physrevresearch.3.l042007

Authors: M. Kononenko, M. A. Yurtalan, S. Ren, J. Shi, S. Ashhab, A. Lupascu

Institutions: University of Waterloo, Hamad bin Khalifa University, National Institute of Information and Communications Technology, Qatar Foundation

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625