Determining eigenvalues of a density matrix with minimal information in a single experimental setting

Tohru Tanaka, Yukihiro Ota, Mitsunori Kanazawa, Gen Kimura, Hiromichi Nakazato, Franco Nori

研究成果: Article査読

10 被引用数 (Scopus)

抄録

Eigenvalues of a density matrix characterize well the quantum state's properties, such as coherence and entanglement. We propose a simple method to determine all the eigenvalues of an unknown density matrix of a finite-dimensional system in a single experimental setting. Without fully reconstructing a quantum state, eigenvalues are determined with the minimal number of parameters obtained by a measurement of a single observable. Moreover, its implementation is illustrated in linear optical and superconducting systems.

本文言語English
論文番号012117
ジャーナルPhysical Review A - Atomic, Molecular, and Optical Physics
89
1
DOI
出版ステータスPublished - 2014 1 21

ASJC Scopus subject areas

  • 原子分子物理学および光学

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