摘要We present a controlled teleportation scheme for teleporting an arbitrary superposition state of an M-qudit quantum system. The scheme employs only one entangled state as quantum channel, which consists of the qudits from Alice, Bob and every agent. The quantum operations used in the teleportation process are a series of qudit Bell measurements, single-qudit projective measurements, qudit H-gates, qudit-Pauli gates and qudit phase gates. It is shown that the original state can be restored by the receiver only on the condition that all the agents collaborate. If any agent does not cooperate, the original state can not be fully recovered.
Abstract：We present a controlled teleportation scheme for teleporting an arbitrary superposition state of an M-qudit quantum system. The scheme employs only one entangled state as quantum channel, which consists of the qudits from Alice, Bob and every agent. The quantum operations used in the teleportation process are a series of qudit Bell measurements, single-qudit projective measurements, qudit H-gates, qudit-Pauli gates and qudit phase gates. It is shown that the original state can be restored by the receiver only on the condition that all the agents collaborate. If any agent does not cooperate, the original state can not be fully recovered.
[1] Bennett C H et al 1993 Phys. Rev. Lett. 70 1895 [2] Fang J X 2003 Commun. Theor. Phys. 40 519 [3] Li X H et al 2005 quant-ph/0511223 [4] Liu J M and Guo G C 2002 Chin. Phys. Lett. 19 456 [5] Zhan X G, Li H M and Zeng H S 2006 Chin. Phys. Lett. 23 2900 [6] Zhou J D, Hou G and Zhang Y D 2001 Phys. Rev. A 64 012301 [7] Wang X G 2001 Phys. Rev. A 64 022302 [8] Fujii M 2003 Phy. Rev. A 68 050302 [9] Li X H, Deng F G and Zhou H Y 2007 Chin. Phys. Lett. 24 1151 [10] Zhou P et al 2007 quant-ph/0705.2660 [11] Gao T, Yan F L and Wang Z X Chin. Phys. 14 893 [12] Yang C P, Chu S I and Han S 2004 Phys. Rev. A 70022329 [13] Zhou J D et al quant-ph/0006030 [14] Jiang W X et al 2007 Chin. Phys. Lett. 24 1144 [15] Nielsen M A, Bremner M J, Dodd J L, Childs A M and DawsonC M 2002 Phys. Rev. A 66 022317
2007, Vol. 24 
