Physics – Quantum Physics
Scientific paper
2007-11-29
Physics
Quantum Physics
Phys. Rev. Lett. 102, 100401 (2009)
Scientific paper
We show that the quantum Fisher information provides a sufficient condition to recognize multi-particle entanglement in a $N$ qubit state. The same criterion gives a necessary and sufficient condition for sub shot-noise phase sensitivity in the estimation of a collective rotation angle $\theta$. The analysis therefore singles out the class of entangled states which are {\it useful} to overcome classical phase sensitivity in metrology and sensors. We finally study the creation of useful entangled states by the non-linear dynamical evolution of two decoupled Bose-Einstein condensates or trapped ions.
Pezzé Luca
Smerzi Augusto
No associations
LandOfFree
Entanglement, Non-linear Dynamics, and the Heisenberg Limit 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 Entanglement, Non-linear Dynamics, and the Heisenberg Limit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Entanglement, Non-linear Dynamics, and the Heisenberg Limit will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-702188