Quantum Secure Direct Communication by Using Three-Dimensional Hyperentanglement

• Published in: Communications in theoretical physics Vol. 56; no. 11; pp. 831 - 836
• Main Author: 施锦 龚彦晓 徐平 祝世宁 詹佑邦
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.11.2011
• Subjects: Bells; Channels; Computer information security; Degrees of freedom; Mathematical analysis; Messages; Photons; Three dimensional; 三维; 光子传输; 双光子; 子秘密; 自由度; 量子信息; 量子安全直接通信; 量子通道

We propose two schemes for realizing quantum secure direct communication （QSDC） by using a set of ordered two-photon three-dimensional hyperentangled states entangled in two degrees of freedom （DOFs） as quantum information channels. In the first scheme, the photons from Bob to Alice are transmitted...