Integrated photonic qubit quantum computing on a superconducting chip

TL;DR

This paper proposes an integrated, scalable superconducting chip design for photonic qubit quantum computing, utilizing microwave photons and Josephson devices for control and interaction, with realistic gate error rates.

Contribution

It introduces a novel integrated approach combining microwave photonic qubits and Josephson devices on a superconducting chip for scalable quantum computing.

Findings

Gate error rates are within realistic limits.

Control is achieved via coupling to Josephson devices.

The scheme is compatible with existing technologies.

Abstract

We study a quantum computing system using microwave photons in transmission line resonators on a superconducting chip as qubits. We show that all control necessary for quantum computing can be implemented by coupling to Josephson devices on the same chip, and take advantage of their strong inherent nonlinearities to realize qubit interactions. We analyze the gate error rate to demonstrate that our scheme is realistic even for Josephson devices with limited decoherence times. A conceptually innovative solution based on existing technologies, our scheme provides an integrated and scalable approach to the next key milestone for photonic qubit quantum computing.