Continuous variable quantum teleportation with non-Gaussian resources

TL;DR

This paper explores how non-Gaussian entangled states can enhance continuous variable quantum teleportation, demonstrating improved fidelity through optimized resource states that balance entanglement, non-Gaussianity, and similarity to squeezed vacuum.

Contribution

It introduces a new class of two-mode squeezed Bell-like states that optimize teleportation fidelity, advancing the understanding of non-Gaussian resources in quantum communication.

Findings

Optimized non-Gaussian resources significantly improve teleportation fidelity.

Squeezed Bell-like states outperform other degaussified resources.

Maximizing entanglement, non-Gaussianity, and similarity yields the best teleportation performance.

Abstract

We investigate continuous variable quantum teleportation using non-Gaussian states of the radiation field as entangled resources. We compare the performance of different classes of degaussified resources, including two-mode photon-added and two-mode photon-subtracted squeezed states. We then introduce a class of two-mode squeezed Bell-like states with one-parameter dependence for optimization. These states interpolate between and include as subcases different classes of degaussified resources. We show that optimized squeezed Bell-like resources yield a remarkable improvement in the fidelity of teleportation both for coherent and nonclassical input states. The investigation reveals that the optimal non-Gaussian resources for continuous variable teleportation are those that most closely realize the simultaneous maximization of the content of entanglement, the degree of affinity with the two-mode squeezed vacuum and the, suitably measured, amount of non-Gaussianity.