Abstract
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.
Highlights
For quantum information processing, one of the feasible resources to transfer is a flying photon
When Trent constructs the entanglement channel, which consists of one electron spin in a quantum dots (QDs)-cavity system and two photons, Alice and Bob can activate the QT protocol
A singly charged QD embedded inside a single-sided cavity in Fig. 1(a)[16,19,20,21,22,24,30] is composed of two GaAs/Al(Ga)As distributed Bragg reflectors (DBRs) and transverse index guiding for three-dimensional confinement of light
Summary
One of the feasible resources to transfer is a flying photon. Interactions between a photon and a singly charged quantum dot inside an optical cavity For distribution of the authenticated entanglement channel by Trent and the teleportation of the unknown state between Alice and Bob, our scheme utilizes two kinds of QD-cavity system, which consist of a single charged QD inside a resonant micropillar cavity, such as single-16,19–22,24,30 and double-sided[23,25,26,27,28,29] cavities.
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