Schmidt-number benchmark for genuine quantum memories and gates

Details Schmidt-number benchmark for genuine quantum memories and gates Schmidt-number benchmark for genuine quantum memories and gates

2012-02-02

arxiv.org/abs/1202.0346v1

Phys. Rev. A 85, 010305(R) (2012)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.85.010305

We propose to apply the notion of the Schmidt number in order to show that a quantum memory or gate process is capable of maintaining a genuine multi-level quantum coherence. We present a simple criterion in terms of an average gate fidelity with respect to the input states of two mutually unbiased bases and demonstrate the coherence of the gate operation in several existing experiments. The Schmidt-number benchmark naturally includes the quantum benchmark as a specific case.

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