摘要
We present a quantum hyperdense coding protocol with hyperentanglement in polarization and spatial-mode degrees of freedom of photons first and then give the details for a quantum secure direct communication(QSDC)protocol based on this quantum hyperdense coding protocol.This QSDC protocol has the advantage of having a higher capacity than the quantum communication protocols with a qubit system.Compared with the QSDC protocol based on superdense coding with𝑑-dimensional systems,this QSDC protocol is more feasible as the preparation of a high-dimension quantum system is more difficult than that of a two-level quantum system at present.
作者
WANG Tie-Jun
LI Tao
DU Fang-Fang
DENG Fu-Guo
王铁军;李涛;杜芳芳;邓富国;LONG Gui-Lu(Department of Physics,Applied Optics Beijing Area Major Laboratory,Beijing Normal University,Beijing 100875;College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875;Beijing Radiation Center,Beijing 100875;不详)
基金
Supported by the National Natural Science Foundation of China under Grant No 10974020
the Beijing Natural Science Foundation under Grant No 1082008
the Fundamental Research Funds for the Central Universities。
