Journal
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
Volume 48, Issue 5, Pages 1485-1490Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10773-008-9920-x
Keywords
Controlled teleportation; Cluster state; Non-maximally entangled state
Categories
Funding
- National Natural Science Foundation of China [60807014, 10404010]
- Natural Science Foundation of Jiangxi Province, China [0512007]
- Research Foundation of the Education Department of Jiangxi Province [2005-79]
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A new scheme for controlled teleportation with the help of a four-qubit cluster state is proposed. In this scheme, a four-particle cluster state is shared by a sender, a controller and a receiver. The sender first performs a Bell-basis measurement on the qubits at hand, and the controller performs measurements under a non-maximally entangled Bell-basis after he knows the sender's measurement result. Then the receiver introduces an auxiliary qubit and performs some appropriate unitary transformations on his qubits. Quantum teleportation is realized after the receiver performs a local measurement on the auxiliary qubit and an appropriate unitary transformation on his qubit.
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