In this work, a novel protocol is proposed for bidirectional controlled quantum telepor-tation (BCQT) in which a quantum channel is used with the eight-qubit entangled state.Using the protocol, two users can teleport an arbitrary entangled state and a pure two-qubit state (QBS) to each other simultaneously under the permission of a third party in therole of controller. This protocol is based on the controlled-not operation, appropriatesingle-qubit (SIQ) UOs, and SIQ measurements in theZandX-basis. Also, in this paper, anew criterion of merit named as (predictability of the controller’s qubit (QB) by theeavesdropper) is introduced, and the protocol is improved based on it. Then, the proposedprotocol is investigated in two typical noisy channels, the amplitude-damping noise(ADN) and the phase-damping noise (PDN). The analysis of the protocol in the noisyenvironment shows that it only depends on the amplitude of the initial state and thedecoherence noisy rate (DR).
کلید واژگان :Bidirectional controlled teleportation . Two-qubit state . Entangled state . Eight-qubit channel .Amplitude-damping noise . Phase-damping noise
ارزش ریالی : 600000 ریال
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