Floquet-Engineered Enhancement of Coherence Times in a Driven Fluxonium Qubit

Abstract

In the last two decades the development of superconducting qubits has yielded tremendous improvement, with coherence times increasing over five orders of magnitude. Theory and experiment have shown that $1/f$ noise is currently the limiting factor for qubit coherence in state-of-the-art devices. Here the authors use a qubit's Floquet states to store quantum information, mitigating $1/f$ flux noise and achieving a 40-fold improvement in coherence time. This experimental demonstration solves a longstanding, critical problem in the field, as it provides a promising approach for dynamically suppressing the ubiquitous $1/f$ noise in quantum devices.

Topics & Concepts