Entanglement, nonlinear dynamics, and the heisenberg limit.

L. Pezzè; A. Smerzi

DOI:10.1103/PhysRevLett.102.100401

Corpus ID: 13095638

Entanglement, nonlinear dynamics, and the heisenberg limit.

@article{Pezz2009EntanglementND,
  title={Entanglement, nonlinear dynamics, and the heisenberg limit.},
  author={L. Pezz{\`e} and A. Smerzi},
  journal={Physical review letters},
  year={2009},
  volume={102 10},
  pages={
          100401
        }
}

L. Pezzè, A. Smerzi

Published 2009

Medicine, Physics

Physical review letters

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

View on PubMed