Quantum estimation by local observables

Masahiro Hotta, Masanao Ozawa

研究成果: Article査読

16 被引用数 (Scopus)

抄録

The application of quantum estimation theory to solve the estimation problems for unknown parameters in the state of the system under investigation was analyzed. A Cramér Rao type inequality was established by obtaining an explicit form the Fisher information as a reciprocal lower bound for the mean-square errors of estimations by locally accessible observables. It was observed that the theory is also applicable in problem related to real situations. The application of this theory for solving problems for composite systems, where nontrivial combinatorics is needed for obtaining the Fisher information, was also analyzed.

本文言語English
論文番号022327
ページ(範囲)022327-1-0223271-3
ジャーナルPhysical Review A - Atomic, Molecular, and Optical Physics
70
2
DOI
出版ステータスPublished - 2004 8

ASJC Scopus subject areas

  • 原子分子物理学および光学

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