Optimal fidelity of teleportation with continuous-variable using three-tunable parameters in realistic environment

TL;DR

This paper introduces three tunable parameters to optimize the fidelity of continuous-variable quantum teleportation in realistic, nonideal environments, demonstrating improved robustness against decoherence and measurement imperfections.

Contribution

It presents a novel method of optimizing teleportation fidelity using three tunable parameters and analyzes their effectiveness under realistic conditions.

Findings

Three tunable parameters significantly improve teleportation fidelity.

Optimization with three parameters outperforms single- and two-parameter methods.

Tunable parameters enhance robustness against environmental decoherence.

Abstract

We introduce three tunable parameters to optimize the fidelity of quantum teleportation with continuous-variable in nonideal scheme. Using the characteristic function formalism, we present the condition that the teleportation fidelity is independent of the amplitude of input coherent states for any entangled resource. Then we investigate the effects of tunable parameters on the fidelity with or without the presence of environment and imperfect measurements, by analytically deriving the expression of fidelity for three different input coherent state distributions. It is shown that, for the linear distribution, the optimization with three tunable parameters is the best one with respect to single- and two-parameter optimization. Our results reveal the usefulness of tunable parameters for improving the fidelity of teleportation and the ability against the decoherence.