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Controlled Teleportation of an Arbitrary Multi-Qudit State in a General Form with d-Dimensional Greenberger--Horne--Zeilinger States |
| LI Xi-Han 1,2,3;DENG Fu-Guo 1,2,3;ZHOU Hong-Yu 1,2,3 |
| 1The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 1008752Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 1008753Beijing Radiation Center, Beijing 100875 |
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| Cite this article: |
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LI Xi-Han, DENG Fu-Guo, ZHOU Hong-Yu 2007 Chin. Phys. Lett. 24 1151-1153 |
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Abstract A general scheme for controlled teleportation of an arbitrary multi-qudit state with d-dimensional Greenberger--Horne--Zeilinger (GHZ) states is proposed. For an arbitrary m-qudit state, the sender Alice performs m generalized Bell-state projective measurements on her 2m qudits and the controllers need only take some single-particle measurements. The receiver Charlie can reconstruct the unknown m-qudit state by performing some single-qudit unitary operations on her particles if she cooperates with all the controllers. As the quantum channel is a sequence of maximally entangled GHZ states, the intrinsic efficiency for qudits in this scheme approaches 100% in principle.
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| Keywords:
03.67.Hk
03.65.Ud
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Received: 07 December 2006
Published: 23 April 2007
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| PACS: |
03.67.Hk
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(Quantum communication)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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