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Communications in Theoretical Physics

Controlled Teleportation of Multi-qutrit Quantum Information by Swapping Entanglement

Jie Yang, Jun Liu

Published Feb 1, 2008• 16 citations
Publisher

Abstract

We present a scheme for teleporting multi-qutrit quantum information from a sender to a receiver via the control of many agents in a network. Agents's control parameters are obtained via quantum entanglement swapping. In our scheme, Zhang and Man's QSS protocol [Phys. Rev. A 72 (2005) 022303] based on Bell-state entanglement swapping is generalized to a qutrit case. Our scheme owns the advantage of having higher code capacity and better security than the work [Commun. Theor. Phys. 44 (2005) 847] on controlled teleportation for multi-qubit.

DOI
10.1088/0253-6102/49/2/18

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理论物理通讯：英文版•Jan 1, 2009•2 citations
We present a scheme for teleporting multi-qutrit quantum information from a sender to a receiver via the control of many agents in a network. Agents's control parameters are obtained via quantum entanglement swapping. In our scheme, Zhang and Man's QSS protocol [Phys. Rev. A 72 (2005) 022303] based on Bell-state entanglement swapping is generalized to a qutrit case. Our scheme owns the advantage of having higher code capacity and better security than the work [Commun. Theor. Phys. 44 (2005) 847] on controlled teleportation for multi-qubit.
In this paper, we present a scheme for teleporting multi-qudit quantum state, from the sender Alice to the receiver Charlie via many controllers Bobs, whose control parameters are obtained using entanglement swapping of maximally d-dimensional EPR pair. In our scheme, Yang's qutrit controlled teleportation protocol [Commun. Theor. Phys. 49 (2008) 338] based on Bell-state entanglement swapping is generalized to the qudit case. The scheme of multi-qudit owns the advantage of having higher code capacity and better security than that of multi-qutrit.
We present a method to teleport multi-qubit quantum information in an easy way from a sender to a receiver via the control of many agents in a network. Only when all the agents collaborate with the quantum information receiver can the unknown states in the sender's qubits be fully reconstructed in the receiver's qubits. In our method, agents's control parameters are obtained via quantum entanglement swapping. As the realization of the many-agent controlled teleportation is concerned, compared to the recent method [C.P. Yang, et al. , Phys. Rev. A 70 (2004) 022329], our present method considerably reduces the preparation difficulty of initial states and the identification difficulty of entangled states, moreover, it does not need local Hadamard operations and it is more feasible in technology.
Utilizing both the general quantum teleportation and the two-step protocol, a new method is presented by which multi-qubit quantum information can be teleported in a much easier way from a sender Alice to a receiver Bob via the control of many agents in a network than by Yang et al 's method. In this method, only all the agents collaborate with Bob can the unknown states in Alice's qubits be fully reconstructed in Bob's qubits. Comparisons between the method and Yang et al 's method are made. Results show that, in this method, the preparation difficulty of initial states and the identification difficulty of entangled states are considerably reduced, new method is more feasible in technique and Hadamard operations are not needed at all.
我们在场为在一个网络经由许多代理人的控制从一个发送者移植 multi-qutrit 量信息到接收装置的电视的一个计划。代理人的控制参数经由量纠纷交换被获得。在我们的计划，张和人是 QSS 协议[Phys。加快。一 72 (2005 ) 022303 ] 基于钟状态，纠纷交换被概括到一个 qutrit 盒子。我们的计划拥有比工作有更高的代码能力和更好的安全的优点[Commun。Theor。Phys。44 (2005 ) 847 ] 在为 multi-qubit 的控制远距传物上。
We present a way to teleport multi-qubit quantum information from one place to a distant receiver via the control of many agents in a network. We show that the original state of each qubit can be restored by the receiver as long as all the agents collaborate; however, if even one agent does not cooperate, in general the receiver can not fully recover the original state of each qubit. The method presented here operates essentially through entangling quantum information during the teleportation, in such a way that the required auxiliary qubit resources, local operation, and classical communication are considerably reduced for the present purpose
在这篇论文，我们在场为移植 multi-qudit 量状态的电视的一个计划从到经由许多控制器的接收装置查理的艾莉斯摆动的发送者，谁的控制参数，用纠纷交换格言联盟者被获得 d 维的 EPR 对。在我们的计划，杨的 qutrit 控制了远距传物协议[Commun。Theor。Phys。49 (2008 ) 338 ] 基于钟状态，纠纷交换被概括到 qudit 盒子。multi-qudit 的计划拥有比 multi-qutrit 的有更高的代码能力和更好的安全的优点。