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International Journal of Theoretical Physics

Scheme for Bidirectional Quantum Teleportation of Unknown Electron-Spin States of Quantum Dots within Single-Sided Cavities

Jino Heo, Changho Hong, Min-Sung Kang, Hyung-Jin Yang

Published Oct 29, 2020• 3 citations
Publisher
DOI
10.1007/s10773-020-04626-7

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We propose a controlled quantum teleportation scheme to teleport an unknown state based on the interactions between flying photons and quantum dots (QDs) confined within single- and double-sided cavities. In our scheme, users (Alice and Bob) can teleport the unknown state through a secure entanglement channel under the control and distribution of an arbitrator (Trent). For construction of the entanglement channel, Trent utilizes the interactions between two photons and the QD-cavity system, which consists of a charged QD (negatively charged exciton) inside a single-sided cavity. Subsequently, Alice can teleport the unknown state of the electron spin in a QD inside a double-sided cavity to Bob's electron spin in a QD inside a single-sided cavity assisted by the channel information from Trent. Furthermore, our scheme using QD-cavity systems is feasible with high fidelity, and can be experimentally realized with current technologies.
In this article, we propose an experimental scheme for implementing quantum teleportation of tripartite GHZ-Like state under the control of the controller. Due to the entanglement produced by the interaction between quantum dots embedded in microcavities and a single photon, the controlled quantum teleportation scheme of tripartite GHZ-Like state encoded in the electron spins in quantum dots can be realized in terms of theory via the conditional Faraday rotation of the polarization of single photons, single photons detection, and electron spin orientation measurement. By choosing the appropriate Faraday rotation angle for the switchable microcavities, the success probability of controlled quantum teleportation can reach 1. The similar controlled quantum teleportation procedure discussed here can be generalized to the quantum teleportation of multipartite GHZ-Like state.