Demonstration of active feedforward one-way quantum computing with photon-matter hyperentanglement

Abstract

We report an optical one-way quantum computing experiment with stationary quantum memory involved. First we create a hybrid four-qubit cluster state with two qubits propagating as photons and the other two stationary and stored in a laser-cooled atomic-ensemble quantum memory, and characterize it with entanglement witness and quantum state tomography. Then, by making use of this cluster state and fast operations of electro-optic modulators, we realize memory-assisted feedforward operations and demonstrate deterministic single-qubit rotation as an example.

5 pages, 3 figures

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Cited by in corpus (5)

• Prospective applications of optical quantum memories
• Storage of hyperentanglement in a solid-state quantum memory
• Verification of high-dimensional entanglement generated in quantum interference
• Cascading Quantum Light-Matter Interfaces
• Light Storage in Light Cages: A Scalable Platform for Multiplexed Quantum Memories