Copying of entangled states and the degradation of correlations

Details Copying of entangled states and the degradation of correlations Copying of entangled states and the degradation of correlations

1998-08-24

arxiv.org/abs/quant-ph/9808043v1

Fortsch.Phys. 49 (2001) 1001-1009

Physics

Quantum Physics

8 pages, RevTex, 6 EPS figures, submitted to Phys. Rev. A

Scientific paper

We investigate the degree to which entanglement survives when a correlated
pair of two-state systems are copied using either local or non-local processes.
We show how the copying process degrades the entanglement, due to a residual
correlation between the copied output and the copying machine (itself made of
qubits).

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