Controlled teleportation of an arbitrary n-qudit state using nonmaximally entangled GHZ states
School of Electronic Information Engineering, Tianjin University, Tianjin 300072, P.R. China
Corresponding author: a firstname.lastname@example.org
Revised: 13 June 2008
Published online: 16 July 2008
In this paper, we explicitly present a general scheme for controlled quantum teleportation of an arbitrary multi-qudit state with unit fidelity and non-unit successful probability using d-dimensional nonmaximally entangled GHZ states as the quantum channel and generalized d-dimensional Bell states as the measurement basis. The expression of successful probability for controlled teleportation is present depending on the degree of entanglement matching between the quantum channel and the generalized Bell states. And the formulae for the selection of operations performed by the receiver are given according to the results measured by the sender and the controller.
PACS: 03.67.Hk – Quantum communication / 03.67.Dd – Quantum cryptography and communication security / 03.65.Ud – Entanglement and quantum nonlocality
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008