Demonstration of entanglement-enhanced phase estimation in solid

@article{Liu2015DemonstrationOE,
  title={Demonstration of entanglement-enhanced phase estimation in solid},
  author={Gang-Qin Liu and Yu-Ran Zhang and Yan-Chun Chang and Jie-Dong Yue and Heng Fan and Xin-Yu Pan},
  journal={Nature Communications},
  year={2015},
  volume={6}
}
Precise parameter estimation plays a central role in science and technology. The statistical error in estimation can be decreased by repeating measurement, leading to that the resultant uncertainty of the estimated parameter is proportional to the square root of the number of repetitions in accordance with the central limit theorem. Quantum parameter estimation, an emerging field of quantum technology, aims to use quantum resources to yield higher statistical precision than classical approaches… 
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