Enhancement of Entanglement Percolation in Quantum Networks via Lattice Transformations

Details Enhancement of Entanglement Percolation in Quantum Networks via Lattice Transformations Enhancement of Entanglement Percolation in Quantum Networks via Lattice Transformations

2008-07-08

arxiv.org/abs/0807.1118v4

Physics

Quantum Physics

12 pages, 17 figures, revtex4. changes from v3: minor stylistic changes for journal reviewer, minor changes to figures for jou

Scientific paper

We study strategies for establishing long-distance entanglement in quantum networks. Specifically, we consider networks consisting of regular lattices of nodes, in which the nearest neighbors share a pure, but non-maximally entangled pair of qubits. We look for strategies that use local operations and classical communication. We compare the classical entanglement percolation protocol, in which every network connection is converted with a certain probability to a singlet, with protocols in which classical entanglement percolation is preceded by measurements designed to transform the lattice structure in a way that enhances entanglement percolation. We analyze five examples of such comparisons between protocols and point out certain rules and regularities in their performance as a function of degree of entanglement and choice of operations.

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