Generation of high-fidelity four-photon cluster state and quantum-domain demonstration of one-way quantum computing

Abstract

We experimentally demonstrate a simple scheme for generating a four-photon entangled cluster state with fidelity over 0.860 $\pm$ 0.015. We show that the fidelity is high enough to guarantee that the produced state is distinguished from Greenberger-Horne-Zeilinger, W, and Dicke types of genuine four-qubit entanglement. We also demonstrate basic operations of one-way quantum computing using the produced state and show that the output state fidelities surpass classical bounds, which indicates that the entanglement in the produced state essentially contributes to the quantum operation.

5 pages, 5 figures

References in corpus (6)

• Experimental entanglement of six photons in graph states
• High-speed linear optics quantum computing using active feed-forward
• Detecting Genuine Multipartite Entanglement with Two Local Measurements
• Experimental Analysis of a 4-Qubit Cluster State
• Entanglement Detection in the Stabilizer Formalism
• Realization and characterization of a 2-photon 4-qubit linear cluster state

Cited by in corpus (1)

• Evolution equation of entanglement for general bipartite systems