Physical implementation of topologically decoherence-protected superconducting qubits

TL;DR

This paper proposes a practical method to implement topologically decoherence-protected superconducting qubits using superconducting devices coupled to a microwave cavity, leveraging geometric operations and magnetic flux control.

Contribution

It introduces a novel physical implementation scheme for topologically protected superconducting qubits with accessible control methods.

Findings

Achieves selective interactions and single-qubit gates via external magnetic flux.

Demonstrates the feasibility of combining individual addressing with multi-device setups.

Provides a comparison highlighting advantages over trapped-ion systems.

Abstract

We propose a scenario to physically implement a kind of topologically decoherence-protected qubit using superconducting devices coupled to a micro-wave cavity mode with unconventional geometric operations. It is shown that the two needed interactions for selective devices, which are required for implementing such protected qubits, as well as single-qubit gates, can be achieved by using the external magnetic flux. The easy combination of individual addressing with the many-device setup proposed in the system presents a distinct merit in comparison with the implementation of topologically protected qubits in a trapped-ion system.