One-way quantum computing with arbitrarily large time-frequency continuous-variable cluster states from a single optical parametric oscillator

TL;DR

This paper proposes a scalable method to generate large, universal continuous-variable cluster states for one-way quantum computing using a single optical parametric oscillator and a novel measurement protocol.

Contribution

It combines time and frequency domain approaches to create a large, universal entangled resource with a new measurement protocol for enhanced computation.

Findings

Generated cluster states with up to 3000 frequencies and unlimited temporal modes.

Achieved a scalable, universal resource for continuous-variable quantum computing.

Introduced a measurement protocol improving computational performance.

Abstract

One-way quantum computing is experimentally appealing because it requires only local measurements on an entangled resource called a cluster state. Record-size, but non-universal, continuous-variable cluster states were recently demonstrated separately in the time and frequency domains. We propose to combine these approaches into a scalable architecture in which a single optical parametric oscillator and simple interferometer entangle up to ($3\times 10^3$ frequencies) $\times$ (unlimited number of temporal modes) into a new and computationally universal continuous-variable cluster state. We introduce a generalized measurement protocol to enable improved computational performance on this new entanglement resource.