Metrology with entangled states

@inproceedings{Mitchell2005MetrologyWE,
  title={Metrology with entangled states},
  author={Morgan W. Mitchell},
  year={2005}
}
It is well known that classical states of light exhibit shot noise, characteristic of independent or uncorrelated particles. For phase estimation problems, this leads to a shot-noise limited uncertainty of 1/sqrt[N], where N is the number of particles detected. It is also well known that the shot-noise limit is not fundamental: squeezed states and entangled states can be used for sub-shot-noise phase measurements. The fundamental or ”Heisenberg” limit is set by the uncertainty principle: the… CONTINUE READING

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