Transmission distance and number of users limit the realization of large-scale scalable quantum communication networks,as existing quantum network construction techniques struggle to address these two important factor...Transmission distance and number of users limit the realization of large-scale scalable quantum communication networks,as existing quantum network construction techniques struggle to address these two important factors simultaneously.In this paper,we propose a long-distance large-scale and scalable fully-connected quantum secure direct communication(QSDC)network,which employs a double-pumped structure and the introduction of extra noise to successfully realize QSDC over 300 km between four users in the network in pairs.The results demonstrate that the fidelity of the entangled state shared between users following communication remains above 85%.The results of our research demonstrate the viability of this quantum communication network,offering a novel foundation for the future realization of long-distance large-scale quantum communication.展开更多
In this paper, we propose certain different design ideas on a novel topic in quantum cryptography — quantum operation sharing(QOS). Following these unique ideas, three QOS schemes, the "HIEC"(The scheme who...In this paper, we propose certain different design ideas on a novel topic in quantum cryptography — quantum operation sharing(QOS). Following these unique ideas, three QOS schemes, the "HIEC"(The scheme whose messages are hidden in the entanglement correlation), "HIAO"(The scheme whose messages are hidden with the assistant operations) and "HIMB"(The scheme whose messages are hidden in the selected measurement basis), have been presented to share the single-qubit operations determinately on target states in a remote node. These schemes only require Bell states as quantum resources. Therefore, they can be directly applied in quantum networks, since Bell states are considered the basic quantum channels in quantum networks. Furthermore, after analyse on the security and resource consumptions, the task of QOS can be achieved securely and effectively in these schemes.展开更多
基金supported in part by the National Natural Science Foundation of China(12074155,62375164,and 12192252)the Shuguang Program of Shanghai Education Development Foundation and Shanghai Municipal Education Commission(24SG53)+2 种基金the Guangdong Provincial Quantum Science Strategic Initiative(GDZX2403003)the Foundation for Shanghai Municipal Science and Technology Major Project(2019SHZDZX01-ZX06)SJTU(21X010200828)。
文摘Transmission distance and number of users limit the realization of large-scale scalable quantum communication networks,as existing quantum network construction techniques struggle to address these two important factors simultaneously.In this paper,we propose a long-distance large-scale and scalable fully-connected quantum secure direct communication(QSDC)network,which employs a double-pumped structure and the introduction of extra noise to successfully realize QSDC over 300 km between four users in the network in pairs.The results demonstrate that the fidelity of the entangled state shared between users following communication remains above 85%.The results of our research demonstrate the viability of this quantum communication network,offering a novel foundation for the future realization of long-distance large-scale quantum communication.
基金supported by the National Natural Science Foundation of China(Grant Nos.61272057,61572081 and 61502200)Beijing Higher Education Young Elite Teacher Project(Grant Nos.YETP0475and YETP0477)+2 种基金the Natural Science Foundation of Guangdong Province(Grant No.2014A030310245)the Fundamental Research Funds for the Central Universities(Grant No.21615313)the Youth Foundation of Heilongjiang University from January,2016
文摘In this paper, we propose certain different design ideas on a novel topic in quantum cryptography — quantum operation sharing(QOS). Following these unique ideas, three QOS schemes, the "HIEC"(The scheme whose messages are hidden in the entanglement correlation), "HIAO"(The scheme whose messages are hidden with the assistant operations) and "HIMB"(The scheme whose messages are hidden in the selected measurement basis), have been presented to share the single-qubit operations determinately on target states in a remote node. These schemes only require Bell states as quantum resources. Therefore, they can be directly applied in quantum networks, since Bell states are considered the basic quantum channels in quantum networks. Furthermore, after analyse on the security and resource consumptions, the task of QOS can be achieved securely and effectively in these schemes.
