Geometric global quantum discord of two-qubit states

doi:10.1088/1674-1056/25/3/030301

Abstract

We consider the geometric global quantum discord (GGQD) of two-qubit systems. By analyzing the symmetry of geometric global quantum discord we give an approach for deriving analytical formulae of the extremum problem which lies at the core of computing the GGQD for arbitrary two-qubit states. Furthermore, formulae of GGQD of arbitrary two-qubit states and some concrete examples are presented.

Keywords: geometric global quantum discord two-qubit state

Received: 19 August 2015
Revised: 30 November 2015
Accepted manuscript online:

PACS:

03.67.-a

(Quantum information)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11275131, 11305105, and 11271138) and Simons Foundation (Grant No. 198129).

Corresponding Authors: Tao Li
E-mail: lt881122@sina.com

Cite this article:

Yunlong Xiao(肖运龙), Tao Li(李陶), Shao-Ming Fei(费少明), Naihuan Jing(景乃桓), Zhi-Xi Wang(王志玺), Xianqing Li-Jost(李先清) Geometric global quantum discord of two-qubit states 2016 Chin. Phys. B 25 030301

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