Realization of quantum teleportation under the control of a third party

Abstract

Abstract: A scheme of quantum teleportation is proposed, with a set of two-qubit maximally entangled states and three-qubit partially entangled states as a shared quantum channel, the three-qubit partially entangled states where as the channel can be physically realized from the generalized Greenberger-Horne-Zeilinger (GHZ) states by performing a H(Hadamard) gate and a CNOT gate on it, more importantly, compared to the channels of the general three-particle states, our states allow the transfer of a maximum number of bits from the sender to the receiver. The sender Alice measures his qubits in the Bell basis, then tells the measurement results to controller Charlie from the a classical channel, now Charlie measures his qubits in the partially entangled Bell basis, and tells Bob of the results, at last in order to recover the teleported states successfully, Bob needs to perform a corresponding unitary transformation. In addition, this program uses a non-maximally entangled states as a shared channel, under the control of Charlie, the probability of the successful quantum teleportation may reach 100%.

Key words: quantum information, quantum teleportation, generalized GHZ states, non-maximally entangled states, unitary transformation

CLC Number:

O431.2

FU Yu-qi,CHEN Hang,FANG Jian-xing. Realization of quantum teleportation under the control of a third party[J]. J4, 2014, 31(2): 186-193.

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