Temporal, spectral, and sample-to-sample fluctuations in coherence properties of qubits form an outstanding challenge for the development of upscaled fault-tolerant quantum computers. A ubiquitous source for these fluctuations in superconducting qubits is a set of atomic-scale defects with a two-level structure. Here we propose a way to mitigate these fluctuations and stabilize the qubit performance. We show that frequency modulation of a qubit or, alternatively, of the two-level defects, leads to averaging of the qubit relaxation rate over a wide interval of frequencies.
@article{arxiv.2104.03695,
title = {Stabilization of Qubit Relaxation Rates by Frequency Modulation},
author = {Shlomi Matityahu and Alexander Shnirman and Moshe Schechter},
journal= {arXiv preprint arXiv:2104.03695},
year = {2021}
}
Comments
Main text has 5 pages and 2 figures. Supplemental material has 7 pages and 2 figures