Teleportation of the werner state via graphene-nanoribbon-based quantum channels under the amplitude-damping environment

We study the teleportation of Werner state using electronic spin states at the ends of two same narrow armchair graphene nanoribbons as the quantum channels in the amplitude-damping environment. The influences of amplitude damping, temprature T and Coulomb repulsion U on the dynamics of channel state, output state, and the corresponding fidelity between output and input states are discussed in detail. To faithfully characterize the quality of the teleported state, we also calculate the average fidelity of teleportation. The results show that when T or U increases to a certain value, the channel entanglement will suddenly disappear in evolution, thus leading to the decay behaviors of output entanglement and corresponding fidelity. However, if T < 40 K and U < 6eV, the average fidelity of teleportation under the amplitude-damping channel reaches more than 80% at worst. Therefore, such narrow armchair graphene nanoribbon is identified as a very promising solid-state system for quantum teleportation.

Automated summary

In this study, the teleportation of Werner state using electronic spin states at the ends of two same narrow armchair graphene nanoribbons as quantum channels in an amplitude-damping environment is investigated. The effects of amplitude damping, temperature T, and Coulomb repulsion U on the dynamics of channel state, output state, and the fidelity between output and input states are discussed in detail. The average fidelity of teleportation is also calculated to characterize the quality of the teleported state. The results show that the narrow armchair graphene nanoribbon is a promising solid-state system for quantum teleportation, reaching an average fidelity of more than 80% under the amplitude-damping channel when T < 40 K and U < 6eV.