Stabilization of Qubit Relaxation Rates by Frequency Modulation

Temporal, spectral, and sample-to-sample fluctuations in coherence properties of qubits form an outstanding challenge for the development upscaled fault-tolerant quantum computers. A ubiquitous source these superconducting is a set atomic scale defects with two-level structure. Here we propose way to mitigate stabilize qubit performance. We show that frequency modulation or, alternatively, defects, leads averaging relaxation rate over wide interval frequencies.