Continuous and deterministic all-photonic cluster state of indistinguishable photons

Abstract

Cluster states are key resources for measurement-based quantum information processing. Photonic cluster and graph states, in particular, play indispensable roles in quantum network and quantum metrology. We demonstrate a semiconductor quantum dot based device in which the confined hole spin acts as a needle in a quantum knitting machine producing continuously and deterministically at sub-Gigahertz repetition rate single indistinguishable photons which are all polarization entangled to each other and to the spin in a one dimensional cluster state. By projecting two nonadjacent photons onto circular polarization bases we disentangle the spin from the photons emitted in between, thus continuously and deterministically preparing all-photonic cluster states for the first time. We use polarization tomography on four sequentially detected photons to demonstrate and to directly quantify the robustness of the cluster's entanglement and the determinism in its photon generation.

8 pages, 4 figures, 1 table

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Cited by in corpus (7)

• Deterministic and reconfigurable graph state generation with a single solid-state quantum emitter
• Time-bin entanglement in the deterministic generation of linear photonic cluster states
• Minimizing resource overhead in fusion-based quantum computation using hybrid spin-photon devices
• Hidden anisotropy controls spin-photon entanglement in a charged quantum dot
• The impact of hole $g$-factor anisotropy on spin-photon entanglement generation with InGaAs quantum dots
• Monitoring the generation of photonic linear cluster states with partial measurements
• Optical Quantum Computing