Journal
PRAMANA-JOURNAL OF PHYSICS
Volume 97, Issue 1, Pages -Publisher
INDIAN ACAD SCIENCES
DOI: 10.1007/s12043-023-02521-4
Keywords
Bidirectional quantum teleportation; six-qubit cluster state; GHZ-state measurements; Toffoli-gate operations
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In this article, a new scheme for symmetric bidirectional quantum teleportation is proposed using a six-qubit cluster state as the quantum channel. The efficiency of the proposed protocol is remarkably increased to 50%, which is the highest achieved so far. Interestingly, only GHZ-state measurements and four Toffoli-gate operations are necessary, independent of the number of qubits to be teleported.
Bidirectional quantum teleportation is a fundamental protocol for exchanging quantum information between two quantum nodes. Till now, all bidirectional quantum teleportation protocols have achieved a maximum efficiency of 40%. Here, we propose a new scheme for a symmetric bidirectional quantum teleportation using a six-qubit cluster state as the quantum channel, for symmetric (3 ? 3) qubit bidirectional quantum teleportation of a special three-qubit entangled state. The novelty of our scheme lies in its generalisation for (N ? N) qubit bidirectional quantum teleportation employing a 2N-qubit cluster state. The efficiency of the proposed protocol is remarkably increased to 50% which is the highest till now. Interestingly, only GHZ-state measurements and four Toffoli-gate operations are necessary which is independent of the number (N) of qubits to be teleported.
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