An alternative quantum fidelity for mixed states of qudits
arXiv:0807.1781 · doi:10.1016/j.physleta.2008.10.083
Abstract
We give an alternative definition of quantum fidelity for two density operators on qudits in terms of the Hilbert-Schmidt inner product between them and their purity. It can be regarded as the well-defined operator fidelity for the two operators and satisfies all Jozsa's four axioms up to a normalization factor. One desire property is that it is not computationally demanding.
arXiv comment3 pages, no figs
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