title: Reveal quantum correlation in complementary bases.
abstract: An essential feature of genuine quantum correlation is the simultaneous existence of correlation in complementary bases. We reveal this feature of quantum correlation by defining measures based on invariance under a basis change. For a bipartite quantum state, the classical correlation is the maximal correlation present in a certain optimum basis, while the quantum correlation is characterized as a series of residual correlations in the mutually unbiased bases. Compared with other approaches to quantify quantum correlation, our approach gives information-theoretical measures that directly reflect the essential feature of quantum correlation.
authors: 1] Kuang Yaming Honors School, Nanjing Univeresity, Nanjing, Jiangsu 210093, China [2] Department of Modern Physics and the Collaborative Innovation Center for Quantum Information and Quantum Frontiers, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors: Shengjun
authors: S
authors: Wu
authors: 1] Department of Mathematics, Shanghai Jiaotong University, Shanghai 200240, China [2] Department of Physics and Astronomy, University College London, WC1E 6BT London, United Kingdom.
authors: Zhihao
authors: Z
authors: Ma
authors: 1] Department of Science, Zhijiang College, Zhejiang University of Technology, Hangzhou 310024, China [2] Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore.
authors: Zhihua
authors: Z
authors: Chen
authors: 1] Department of Modern Physics and the Collaborative Innovation Center for Quantum Information and Quantum Frontiers, University of Science and Technology of China, Hefei, Anhui 230026, China [2] Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore.
authors: Sixia
authors: S
authors: Yu