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arxiv: 1109.2666 · v2 · pith:UJDPRXWJnew · submitted 2011-09-13 · 🪐 quant-ph

Information and fidelity in projective measurements

classification 🪐 quant-ph
keywords fidelityinformationmeasurementprojectivecalculatecompletelyd-dimensionaldiscuss
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In this study, we explicitly calculate information and fidelity of an r-rank projective measurement on a completely unknown state in a d-dimensional Hilbert space. We also show a tradeoff between information and fidelity at the level of a single outcome and discuss the efficiency of measurement with respect to fidelity.

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