Fidelity threshold for long-range entanglement in quantum networks
| Autor: | S. Perseguers |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Physics
Quantum Physics Quantum network Bell state Cluster state TheoryofComputation_GENERAL FOS: Physical sciences Quantum capacity Topology Squashed entanglement Multipartite entanglement Atomic and Molecular Physics and Optics Quantum mechanics W state Quantum Physics (quant-ph) Quantum teleportation |
| DOI: | 10.48550/arxiv.0910.1459 |
| Popis: | We present a strategy to generate long-range entanglement in noisy quantum networks. We consider a cubic lattice whose bonds are partially entangled mixed states of two qubits, and where quantum operations can be applied perfectly at the nodes. In contrast to protocols designed for one- or two-dimensional regular lattices, we find that entanglement can be created between arbitrarily distant qubits if the fidelity of the bonds is higher than a critical value, independent of the system size. Therefore, we show that a constant overhead of local resources, together with connections of finite fidelity, is sufficient to achieve long-distance quantum communication in noisy networks. Comment: published version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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