Distance measures to compare real and ideal quantum processes

Details Distance measures to compare real and ideal quantum processes Distance measures to compare real and ideal quantum processes

2004-08-10

arxiv.org/abs/quant-ph/0408063v2

Physical Review A 71, 062310 (2005)

Physics

Quantum Physics

15 pages; this version in line with published version

Scientific paper

10.1103/PhysRevA.71.062310

With growing success in experimental implementations it is critical to identify a "gold standard" for quantum information processing, a single measure of distance that can be used to compare and contrast different experiments. We enumerate a set of criteria such a distance measure must satisfy to be both experimentally and theoretically meaningful. We then assess a wide range of possible measures against these criteria, before making a recommendation as to the best measures to use in characterizing quantum information processing.

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