Phase estimation without a priori knowledge in the presence of loss
arXiv:1006.0734 · doi:10.1103/PhysRevA.82.053804
Abstract
We find the optimal scheme for quantum phase estimation in the presence of loss when no a priori knowledge on the estimated phase is available. We prove analytically an explicit lower bound on estimation uncertainty, which shows that, as a function of number of probes, quantum precision enhancement amounts at most to a constant factor improvement over classical strategies
8 pages, 2 figures, discussion on adaptive strategies added
References in corpus (7)
- Reference frames, superselection rules, and quantum information
- Beating the Standard Quantum Limit with Four Entangled Photons
- Entanglement-free Heisenberg-limited phase estimation
- Optimal Quantum Phase Estimation
- Entangled Fock states for Robust Quantum Optical Metrology, Imaging, and Sensing
- Loss-Induced Limits to Phase Measurement Precision with Maximally Entangled States
- Multiphoton path entanglement by non-local bunching