Physics – Quantum Physics
Scientific paper
2009-09-11
New J. Phys. 12 023010 (10pp) (2010)
Physics
Quantum Physics
4 pages, 2 figures, in submission. Substantial Extension and replacement of arXiv:0902.3260v1 in response to Referees' remarks
Scientific paper
10.1088/1367-2630/12/2/023010
We explore precision in a measurement process incorporating pure probe states, unitary dynamics and complete measurements via a simple formalism. The concept of `information complement' is introduced. It undermines measurement precision and its minimization reveals the system properties at an optimal point. Maximally precise measurements can exhibit independence from the true value of the estimated parameter, but demanding this severely restricts the type of viable probe and dynamics, including the requirement that the Hamiltonian be block-diagonal in a basis of preferred measurements. The curvature of the information complement near a globally optimal point provides a new quantification of measurement stability.
No associations
LandOfFree
Preferred Measurements: Optimality and Stability in Quantum Parameter Estimation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Preferred Measurements: Optimality and Stability in Quantum Parameter Estimation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preferred Measurements: Optimality and Stability in Quantum Parameter Estimation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-427792