公开(公告)号：US11177876B2

公开(公告)日：2021-11-16

申请号：US16977963

申请日：2018-03-14

Applicant: SOOCHOW UNIVERSITY

Inventor： Min Jiang ,  Tao Cai ,  Zhixin Xia ,  Qing Li

IPC: H04B10/032 ,  H04B10/70

Abstract: The invention relates to a method for setting and operating redundant paths in a quantum communication network, wherein a transmitter implements simultaneous transmission of signals on a working path and protection paths. The signal transmitted on the working path is a primary signal, and the signals transmitted on the protection paths are follow-up signals. In a case that the working path is normal, the transmitter forwards the primary signal on the working path level by level, to implement long distance transmission of a quantum signal. In a case that the working path fails, a proxy working path is selected from the remaining protection paths with the highest priority, and the transmission of information is eventually completed on the proxy working path. It can be prevented that unknown quantum information is damaged and becomes unrecoverable during transmission, thereby greatly improving the security, stability, and reliability of information transmission during quantum communication.

公开(公告)号：US12184340B2

公开(公告)日：2024-12-31

申请号：US17801076

申请日：2021-12-16

Applicant: SOOCHOW UNIVERSITY

Inventor： Min Jiang ,  Zongyi Li ,  Qing Li ,  Taichao Li ,  Bin Sun ,  Ao Wang ,  Tianyu Miao

IPC: H04B10/70

Abstract: The invention provides an undetermined terminal-based accelerated joint quantum remote state preparation method, including: determining chain channels between at least two sending terminals and a receiving terminal edge node, and determining GHZ channels between the receiving terminal edge node and a plurality of candidate receiving terminals; jointly preparing, by the at least two sending terminals together, to-be-transferred information for the receiving terminal edge node; and sending, by the receiving terminal edge node, the to-be-transferred information to the plurality of candidate receiving terminals, after a target receiving terminal is determined, performing, by the other candidate receiving terminals, a measurement operation, and performing, by the target receiving terminal, corresponding unitary transformation to recover the to-be-transferred information. Information transfer efficiency and information security are greatly improved, thereby resolving a current problem that a terminal lacks a scheme of remotely preparing a quantum state in a case that a receiving terminal is indefinite.