title: Quantum correlation exists in any non-product state.
abstract: Simultaneous existence of correlation in complementary bases is a fundamental feature of quantum correlation, and we show that this characteristic is present in any non-product bipartite state. We propose a measure via mutually unbiased bases to study this feature of quantum correlation, and compare it with other measures of quantum correlation for several families of bipartite states.
authors.affiliation: School of Mathematics and Computer Science, Shanxi Datong University, Datong, Shanxi 037009, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Guo
authors.affiliation: 1] Kuang Yaming Honors School, Nanjing University, 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.forename: Shengjun
authors.initials: S
authors.lastname: Wu