Information and fidelity in projective measurements
arXiv:1109.2666 · doi:10.1103/PhysRevA.85.022124
Abstract
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.
13 pages, 4 figures
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- Derivative of the disturbance with respect to information from quantum measurements
- Allowed region and optimal measurement for information versus disturbance in quantum measurements
- Information-Theoretic Analysis of Weak Measurements and Their Reversal