Prof. Yueh-Nan Chen (NCTS Center Scientists and profesor in Dep. of Physics, NCKU) collaborated with the theoretical/experimental groups of Prof. Che-Ming Li (Dep. of Engineering Science, NCKU) and Prof. Jian-Wei Pan (USTC, China) on the topic of  quantum steering. They develop a novel formalism to explore a large class of EPR steering from generic multipartite quantum systems of arbitrarily high dimensionality and degrees of freedom, such as graph states and hyperentangled systems. All of these quantum characteristics of genuine high-order EPR steering can be efficiently certified with few measurement settings in experiments. They faithfully demonstrate for the first time such generality by experimentally showing genuine four-partite EPR steering and applications to universal one-way quantum computing. Their formalism provides a new insight into the intermediate type of genuine multipartite Bell nonlocality and potential applications to quantum information tasks and experiments in the presence of untrusted measurement devices.
 
Reference:
Genuine High-Order Einstein-Podolsky-Rosen Steering, Che-Ming Li, Kai Chen, Yueh-Nan Chen, Qiang Zhang, Yu-Ao Chen, and Jian-Wei Pan, Phys. Rev. Lett. 115, 010402 (2015).