Toroidal qubits: naturally-decoupled quiet artificial atoms

TL;DR

This paper introduces a superconducting flux qubit design that inherently resists environmental noise by coupling only through its toroidal moment, enhancing qubit stability for quantum computing.

Contribution

The paper proposes a novel qubit design utilizing toroidal moments to achieve natural decoupling from environmental perturbations, improving qubit protection.

Findings

The toroidal qubit interacts with electromagnetic fields exclusively via its toroidal moment.

This design offers intrinsic noise protection without additional shielding.

Potential for more stable quantum bits in quantum computing applications.

Abstract

The requirements of quantum computations impose high demands on the level of qubit protection from perturbations; in particular, from those produced by the environment. Here we propose a superconducting flux qubit design that is naturally protected from ambient noise. This decoupling is due to the qubit interacting with the electromagnetic field only through its toroidal moment, which provides an unusual qubit-field interaction.