Optimal quantum repeaters with doubly entangled state purification (2009)
Wang, Chuan, Jiao, Rong-Zhen, Ma, Hai-Qiang, Zhang, Yong, Yu, Li
Recently, Briegel et al. present a quantum repeaters protocol using nest entanglement purification for long distance quantum communication(Physical Review Letters \textbf{81},5932). In this paper we...