Hybrid entanglement concentration assisted with single coherent state

Guo Rui¹, Zhou Lan^{1, 2}, Gu Shi-Pu³, Wang Xing-Fu², Sheng Yu-Bo^{1, †,}

Schematic diagram of concentrating an arbitrary less-entangled Bell-type HES. Alice and Bob share the HES, and own the hybrid states denoted as a and b, respectively. Bob prepares the ancillary single coherent state c. BS1 is used to perform a parity check measurement. BS2 is used to obtain the Bell-type maximally HES.