Quantum correlation exists in any non-product state
Yu Guo, Shengjun Wu
TL;DR
This paper demonstrates that quantum correlation, characterized by correlations in complementary bases, exists in all non-product bipartite states and introduces a new measure based on mutually unbiased bases.
Contribution
It introduces a novel measure of quantum correlation using mutually unbiased bases and shows its presence in all non-product bipartite states.
Findings
Quantum correlation exists in all non-product bipartite states.
The proposed measure effectively captures quantum correlations in various states.
Comparison with other measures shows its consistency and advantages.
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.
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