Dynamical suppression of 1/f noise processes in qubit systems

TL;DR

This paper explores how dynamical decoupling can effectively suppress 1/f noise in qubit systems, showing promising results for improving coherence times in solid-state quantum devices.

Contribution

It demonstrates the potential of dynamical decoupling to mitigate 1/f noise effects in realistic qubit environments, highlighting sensitivity to noise characteristics.

Findings

Decoupling improves coherence with slow control rates.

Performance depends on noise Gaussianity and frequency.

Results are promising for solid-state qubits.

Abstract

We investigate the capability of dynamical decoupling techniques to reduce decoherence from a realistic environment generating 1/f noise. The predominance of low frequency modes in the noise profile allows for decoherence scenarios where relatively slow control rates suffice for a drastic improvement. However, the actual figure of merit is very sensitive to the details of the dynamics, with decoupling performance which may deteriorate for non-Gaussian noise and/or high frequency working points. Our results are promising for robust solid-state qubits and beyond.