An improved quantum repeater protocol using hyperentangled state purification
School of Science, Beijing University of Posts and
Telecommunications, Beijing, 100876, P.R. China
2 Department of Physics, Tsinghua University, Beijing 100084, P.R. China
Received in final form: 24 July 2011
Published online: 29 September 2011
This article indicates an improved protocol of quantum repeaters through the scheme of nest entanglement purification [Phys. Rev. Lett. 81, 5932 (1998)]. The hyperentangled photon pairs are utilized to overcome the limitations of long distance quantum communication via noisy channels. In addition, it is mentioned that if there are imperfect quantum operations and noises in realistic communication, the fidelities of hyperentangled quantum channels will be improved compared with the traditional entangled states.
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2011