Entanglement, nonlinear dynamics, and the heisenberg limit.

  title={Entanglement, nonlinear dynamics, and the heisenberg limit.},
  author={Luca Pezz{\'e} and Augusto Smerzi},
  journal={Physical review letters},
  volume={102 10},
We show that quantum Fisher information provides a sufficient condition to recognize multiparticle entanglement in an 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 useful to overcome classical phase sensitivity in metrology and sensors. We finally study the creation of useful entangled states by the… CONTINUE READING

From This Paper

Figures, tables, and topics from this paper.


Publications citing this paper.
Showing 1-10 of 39 extracted citations

Quantum Fisher information for superpositions of spin states

Quantum Information & Computation • 2010
View 4 Excerpts
Highly Influenced

Quantum Fisher Information : Theory and Applications

Volkan Erol Okan
View 2 Excerpts


Publications referenced by this paper.
Showing 1-2 of 2 references


A. Peres
Rev. Lett. 77, 1413 (1996); R. F. Werner, Phys. Rev. A 40, 4277 • 1989

Quantum Detection and Estimation Theory (Academic Press

C. W. Helstrom
New York, 1976), Chap. VIII; A. S. Holevo, Probabilistic and Statistical Aspect of Quantum Theory • 1982

Similar Papers

Loading similar papers…