Lower Bounds for Attainable Fidelity in Entanglement Purification

Details Lower Bounds for Attainable Fidelity in Entanglement Purification Lower Bounds for Attainable Fidelity in Entanglement Purification

1998-09-16

arxiv.org/abs/quant-ph/9809043v1

Phys.Rev. A59 (1999) 2641-2648

Physics

Quantum Physics

11 pages

Scientific paper

10.1103/PhysRevA.59.2641

We derive lower bounds for the attainable fidelity of standard entanglement purification protocols when local operations and measurements are subjected to errors. We introduce an error parameter which measures the distance between the ideal completely positive map describing a purification step and the one in the presence of errors. We derive non--linear maps for a lower bound of the fidelity at each purification step in terms of this parameter.

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