Robust and scalable optical one-way quantum computation

TL;DR

This paper presents a scalable, efficient method for generating large cluster states for optical one-way quantum computing, utilizing atom-cavity systems and linear optics for robust, large-scale quantum information processing.

Contribution

It introduces a deterministic, linear-cost approach to create and store large cluster states using atom-cavity systems, enhancing robustness and scalability.

Findings

Cluster states can be generated deterministically with linear resource scaling.

Photon qubits are encoded for easy single-qubit operations.

Cluster states can be stored in atoms and transferred to photons for computation.

Abstract

We propose an efficient approach for deterministically generating scalable cluster states with photons. This approach involves unitary transformations performed on atoms coupled to optical cavities. Its operation cost scales linearly with the number of qubits in the cluster state, and photon qubits are encoded such that single-qubit operations can be easily implemented by using linear optics. Robust optical one-way quantum computation can be performed since cluster states can be stored in atoms and then transferred to photons that can be easily operated and measured. Therefore, this proposal could help performing robust large-scale optical one-way quantum computation.