The distribution of quantum fidelities

Details The distribution of quantum fidelities The distribution of quantum fidelities

2008-07-30

arxiv.org/abs/0807.4843v1

Phys. Lett. A 372 (2008), 7028--7032.

Physics

Quantum Physics

5 pages, 1 figure

Scientific paper

10.1016/j.physleta.2008.10.034

When applied to different input states, an imperfect quantum operation yields output states with varying fidelities, defined as the absolute square of their overlap with the desired states. We present an expression for the distribution of fidelities for a class of operations applied to a general qubit state, and we present general expressions for the variance and input-space averaged fidelities of arbitrary linear maps on finite dimensional Hilbert spaces.

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