Decoherence due to telegraph and 1/f noise in Josephson qubits

TL;DR

This paper investigates how random telegraph and 1/f noise cause decoherence in Josephson qubits, highlighting differences between gaussian and non-gaussian effects and their impact on qubit dynamics.

Contribution

It provides a detailed analysis of non-gaussian and non-Markovian low-frequency noise effects on Josephson qubits, explaining complex decoherence phenomena.

Findings

Non-gaussian noise significantly affects qubit decoherence.

Differences between gaussian and non-gaussian effects depend on working points.

Low-frequency noise features explain observed spectroscopy and dynamics.

Abstract

We study decoherence due to random telegraph and 1/f noise in Josephson qubits. We illustrate differences between gaussian and non gaussian effects at different working points and for different protocols. Features of the intrinsically non-gaussian and non-Markovian low-frequency noise may explain the rich physics observed in the spectroscopy and the dynamics of charge based devices.