Efficient generation of universal two-dimensional cluster states with hybrid systems

Abstract

We present a scheme to generate two-dimensional cluster state efficiently. The number of the basic gate-entangler-for the operation is in the order of the entanglement bonds of a cluster state, and could be reduced greatly if one uses them repeatedly. The scheme is deterministic and uses few ancilla resources and no quantum memory. It is suitable for large-scale quantum computation and feasible with the current experimental technology.

arXiv comment6 pages, 5 figures

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• Efficient single-photon-assisted entanglement concentration for partially entangled photon pairs
• Efficient two-step entanglement concentration for arbitrary W states
• Cross-Kerr nonlinearity between continuous-mode coherent states and single photons
• Highly Efficient Processing Multi-photon States
• Efficient entanglement concentration for arbitrary less-entangled N-atom state
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• Hybrid quantum repeater with encoding
• Error distributions on large entangled states with non-Markovian dynamics
• Efficient graph state generation and artificial error detection
• Multiple multi-control unitary operations: implementation and applications
• Efficient entanglement length measurements for photonic cluster state sources
• Efficient entanglement concentration for arbitrary less-entangled NOON state assisted with single photon