An alternative quantum fidelity for mixed states of qudits

Details An alternative quantum fidelity for mixed states of qudits An alternative quantum fidelity for mixed states of qudits

2008-07-11

arxiv.org/abs/0807.1781v1

Physics

Quantum Physics

3 pages, no figs

Scientific paper

10.1016/j.physleta.2008.10.083

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.

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