Two-qubit entangled state teleportation via optimal POVM and partially entangled GHZ state

doi:10.1007/s11467-018-0832-9

Frontiers of Physics

2018, Vol. 13

Issue (5): 130320 https://doi.org/10.1007/s11467-018-0832-9

本期目录

Two-qubit entangled state teleportation via optimal POVM and partially entangled GHZ state

Kan Wang¹(

), Xu-Tao Yu², Zai-Chen Zhang¹

¹. National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
². State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China

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Abstract：

Quantum teleportation is of significant meaning in quantum information. In this paper, we study the probabilistic teleportation of a two-qubit entangled state via a partially entangled Greenberger- Horne-Zeilinger (GHZ) state when the quantum channel information is only available to the sender. We formulate it as an unambiguous state discrimination problem and derive exact optimal positive-operator valued measure (POVM) operators for maximizing the probability of unambiguous discrimination. Only one three-qubit POVM for the sender, one two-qubit unitary operation for the receiver, and two cbits for outcome notification are required in this scheme. The unitary operation is given in the form of a concise formula, and the fidelity is calculated. The scheme is further extended to more general case for transmitting a two-qubit entangled state prepared in arbitrary form. We show this scheme is flexible and applicable in the hop-by-hop teleportation situation.

Key words： probabilistic teleportation optimal POVM state discrimination average fidelity

收稿日期: 2018-04-12 出版日期: 2018-09-10

Corresponding Author(s): Kan Wang

引用本文:

. [J]. Frontiers of Physics, 2018, 13(5): 130320.
Kan Wang, Xu-Tao Yu, Zai-Chen Zhang. Two-qubit entangled state teleportation via optimal POVM and partially entangled GHZ state. Front. Phys. , 2018, 13(5): 130320.

链接本文:

https://academic.hep.com.cn/fop/CN/10.1007/s11467-018-0832-9
https://academic.hep.com.cn/fop/CN/Y2018/V13/I5/130320

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