Geometric measure of quantum discord over two-sided projective measurements

被引：9
|
作者：
Xu, Jianwei [1 ]
机构：
[1] Sichuan Univ, Inst Nucl Sci & Technol, Key Lab Radiat Phys & Technol, Chengdu 610065, Peoples R China
来源：
PHYSICS LETTERS A | 2012年 / 376卷 / 04期
关键词：
Quantum discord; Two-sided projective measurement; Geometric measure; NON-MARKOVIAN ENVIRONMENTS; ENTANGLEMENT;
D O I：
10.1016/j.physleta.2011.10.072
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The original definition of quantum discord of bipartite states was defined over one-sided projective measurements, it describes quantum correlations more extensively than entanglement. Dakic, Vedral, and Brukner [Phys. Rev. Lett. 105 (2010) 190502] introduced a geometric measure of quantum discord, Luo and Fu [Phys. Rev. A 82 (2010) 034302] simplified the variation expression of this geometric measure. In this Letter we introduce a geometric measure of quantum discord over two-sided projective measurements. A simplified expression and a lower bound of this two-sided geometric measure are derived and explicit expressions are obtained for some special cases. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：320 / 324
页数：5
相关论文
共 50 条
  • [1] MEASUREMENT-INDUCED NONLOCALITY OVER TWO-SIDED PROJECTIVE MEASUREMENTS
    Guo, Yu
    INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2013, 27 (16):
  • [2] Geometric measure of quantum discord with weak measurements
    Lei Li
    Qing-Wen Wang
    Shu-Qian Shen
    Ming Li
    Quantum Information Processing, 2016, 15 : 291 - 300
  • [3] Geometric measure of quantum discord with weak measurements
    Li, Lei
    Wang, Qing-Wen
    Shen, Shu-Qian
    Li, Ming
    QUANTUM INFORMATION PROCESSING, 2016, 15 (01) : 291 - 300
  • [4] Geometric measure of quantum discord
    Luo, Shunlong
    Fu, Shuangshuang
    PHYSICAL REVIEW A, 2010, 82 (03):
  • [5] Evaluating the geometric measure of quantum discord
    Shunlong Luo
    Shuangshuang Fu
    Theoretical and Mathematical Physics, 2012, 171 : 870 - 878
  • [6] Evaluating the geometric measure of quantum discord
    Luo, Shunlong
    Fu, Shuangshuang
    THEORETICAL AND MATHEMATICAL PHYSICS, 2012, 171 (03) : 870 - 878
  • [7] Dynamics of Geometric Measure of Quantum Discord of Two Qubits in Independent Reservoirs
    Liu, Longjiang
    Zhang, Jiang
    Cheng, Song
    Tong, Dianmin
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2013, 82 (06)
  • [8] A symmetric geometric measure and the dynamics of quantum discord
    蒋峰建
    吕海江
    闫新虎
    石名俊
    Chinese Physics B, 2013, 22 (04) : 94 - 102
  • [9] Peculiarities of quantum discord's geometric measure
    Batle, J.
    Plastino, A.
    Plastino, A. R.
    Casas, M.
    JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, 2011, 44 (50)
  • [10] Witnessed entanglement and the geometric measure of quantum discord
    Debarba, Tiago
    Maciel, Thiago O.
    Vianna, Reinaldo O.
    PHYSICAL REVIEW A, 2012, 86 (02):
12345