Quantum metrology with unitary parametrization processes

  title={Quantum metrology with unitary parametrization processes},
  author={Jing Liu and Xiao-Xing Jing and Xiaoguang Wang},
  booktitle={Scientific reports},
Quantum Fisher information is a central quantity in quantum metrology. We discuss an alternative representation of quantum Fisher information for unitary parametrization processes. In this representation, all information of parametrization transformation, i.e., the entire dynamical information, is totally involved in a Hermitian operator H. Utilizing this… CONTINUE READING

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