Work

Characterizing nonclassical correlations via local quantum Fisher information

Year: 2018

Type: article

Abstract: We define two ways of quantifying the quantum correlations based on quantum Fisher information (QFI) in order to study the quantum correlations as a resource in quantum metrology. By investigating the hierarchy of measurement-induced Fisher information introduced in Lu et al. [X. M. Lu, S. Luo, and C. H. Oh, Phys. Rev. A 86, 022342 (2012)], we show that the presence of quantum correlation can be confirmed by the difference of the Fisher information induced by the measurements of two hierarchies. In particular, the quantitative quantum correlations based on QFI coincide with the geometric discord for pure quantum states.

Source: Physical Review A

DOI: 10.1103/physreva.97.032326

Authors: Sunho Kim, Longsuo Li, Asutosh Kumar, Junde Wu

Institutions: Harbin Institute of Technology, Magadh University, Gaya College, Zhejiang University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Awards: G3318366576, 量子测量与量子操作理论的数学基础研究