Detection of the ideal resource for multiqubit teleportation
Zhao Ming-Jing (赵明镜)a, Chen Bin (陈斌)b, Fei Shao-Ming (费少明)b
a Department of Mathematics, School of Science, Beijing Information Science and Technology University, Beijing 100192, China; b School of Mathematical Sciences, Capital Normal University, Beijing 100048, China
Abstract We give a sufficient condition for detecting the entanglement resource for perfect multiqubit teleportation. The criterion involves only local measurements on some complementary observables and can be experimentally implemented. It is also a necessary condition for full separability of multiqubit states. Moreover, by proving the optimality of teleportation witnesses, we solve the open problem in Phys. Rev. A86, 032315 (2012).
(Entanglement measures, witnesses, and other characterizations)
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11401032, 11275131, and 61473325), the Foundation of Beijing Information Science and Technology University, China (Grant No. 1425032), and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry of China.
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