Scalable one-way quantum computer using on-chip resonator qubits

TL;DR

This paper introduces a scalable, robust architecture for one-way quantum computing using superconducting resonator networks, leveraging long-lived photonic states and mediator qubits for efficient cluster state generation.

Contribution

It presents a novel architecture combining long-coherence photonic qubits with superconducting resonators and mediator qubits for scalable quantum computation.

Findings

Long-lived photon states enhance coherence times.

Scalable creation of large photonic cluster states.

Robustness against parameter variations.

Abstract

We propose a scalable and robust architecture for one-way quantum computation using coupled networks of superconducting transmission line resonators. In our protocol, quantum information is encoded into the long-lived photon states of the resonators, which have a much longer coherence time than the usual superconducting qubits. Each resonator contains a charge qubit used for the state initialization and local projective measurement of the photonic qubit. Any pair of neighboring photonic qubits are coupled via a mediator charge qubit, and large photonic cluster states can be created by applying Stark-shifted Rabi pulses to these mediator qubits. The distinct advantage of our architecture is that it combines both the excellent scalability of the solid-state systems and the long coherence time of the photonic qubits. Furthermore, this architecture is very robust against the parameter variations.