Entangled Chains

Details Entangled Chains Entangled Chains

2000-01-31

arxiv.org/abs/quant-ph/0001114v2

Contemporary Mathematics 305 (2002) 299

Physics

Quantum Physics

16 pages; LaTeX

Scientific paper

Consider an infinite collection of qubits arranged in a line, such that every pair of nearest neighbors is entangled: an "entangled chain." In this paper we consider entangled chains with translational invariance and ask how large one can make the nearest neighbor entanglement. We find that it is possible to achieve an entanglement of formation equal to 0.285 ebits between each pair of nearest neighbors, and that this is the best one can do under certain assumptions about the state of the chain.

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