Decoherence of Flux Qubits Coupled to Electronic Circuits

TL;DR

This paper models the decoherence mechanisms in superconducting flux qubits coupled to electronic circuits, providing insights for optimizing qubit coherence and gate performance in solid-state quantum computing.

Contribution

It introduces a detailed model of decoherence in flux qubits coupled to dissipative circuits, aiding in the design of more coherent quantum systems.

Findings

Decoherence rates are significantly affected by circuit coupling.

Two-qubit gate performance is limited by circuit-induced decoherence.

Design strategies can mitigate decoherence effects.

Abstract

On the way to solid-state quantum computing, overcoming decoherence is the central issue. In this contribution, we discuss the modeling of decoherence of a superonducting flux qubit coupled to dissipative electronic circuitry. We discuss its impact on single qubit decoherence rates and on the performance of two-qubit gates. These results can be used for designing decoherence-optimal setups.