Chained Einstein–Podolsky–Rosen steering inequalities with improved visibility
Hui-Xian Meng, Jie Zhou, Changliang Ren, Hong-Yi Su, Jing‐Ling Chen · International Journal of Quantum Information · 2018
It is known that the linear [Formula: see text]-setting steering inequalities introduced in [D. J. Saunders, S. J. Jones, H. M. Wiseman and G. J. Pryde, Nat. Phys. 6 (2010) 845.] are very efficient inequalities in detecting steerability of the Werner states by using optimal measurement axes. Here, we construct chained steering inequalities that have improved visibility for the Werner states under a finite number of settings. Specifically, the threshold values of quantum violation of our inequalities for the [Formula: see text] settings are lower than those of the linear steering inequalities. Furthermore, for almost all generalized Werner states, the chained steering inequalities always have improved visibility in comparison with the linear steering inequalities.