I propose quantum versions of the Ziv-Zakai bounds as alternatives to the widely used quantum Cramér-Rao bounds for quantum parameter estimation. From a simple form of the proposed bounds, I derive both a Heisenberg error limit that scales with the average energy and a limit similar to the quantum Cramér-Rao bound that scales with the energy variance. These results are further illustrated by applying the bound to a few examples of optical phase estimation, which show that a quantum Ziv-Zakai bound can be much higher and thus tighter than a quantum Cramér-Rao bound for states with highly non-gaussian photon-number statistics in certain regimes and also stay close to the latter where the latter is expected to be tight.
Ziv-Zakai error bounds for quantum parameter estimation.
Published 2011 in Physical Review Letters
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- Publication year
2011
- Venue
Physical Review Letters
- Publication date
2011-11-15
- Fields of study
Medicine, Physics
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Semantic Scholar, PubMed
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