Environment-induced decay of teleportation fidelity of the one-qubit state

TL;DR

This paper investigates how different environmental decoherence types affect the fidelity of one-qubit teleportation, highlighting the varying robustness and the importance of entanglement and purity in maintaining quantum advantage.

Contribution

It provides a comparative analysis of decoherence effects on teleportation fidelity, emphasizing the role of environment type and resource purity in quantum communication.

Findings

Dephasing environments are less detrimental to teleportation fidelity.

Entanglement and purity are both crucial for high-quality teleportation.

Quantum advantage can be lost in finite or infinite time depending on environment.

Abstract

The one-qubit teleportation protocol is reexamined when it is executed in the presence of various decohering environments. The results revealed that this quantum protocol is more robust under the influence of dephaisng environment than those under the influence of dissipative or noisy environment. The environment may deprive the quantum advantage of teleportation over purely classical communication in a finite or infinite lifetime, which is dependent on the type of environment. Also we found that except entanglement, the purity of the entangled state resource is also crucial in determine the quality of the teleported state.