A cloned qutrit and its utility in information processing tasks

TL;DR

This paper investigates the use of output states from a universal quantum cloning machine as resources for quantum information tasks like teleportation and dense coding in a 3x3 qutrit system, revealing their entanglement properties and capacities.

Contribution

It demonstrates that cloning machine outputs can serve as effective entangled resources for quantum communication protocols, expanding the applications of quantum cloning.

Findings

Output states are NPT entangled for certain parameters.

Optimal teleportation fidelities are achieved using these states.

Dense coding capacities depend on machine parameters.

Abstract

We, in this paper, analyze the efficacy of an output as a resource from a universal quantum cloning machine in information processing tasks such as teleportation and dense coding. For this, we have considered the $3\otimes 3$ dimensional system (or qutrit system). The output states are found to be NPT states for certain ranges of machine parameters. Using the output state as an entangled resource, we have also studied the optimal fidelities of teleportation and capacities of dense coding protocols with respect to the machine parameters and have made a few interesting observations. Our work is mainly motivated from the fact that the cloning output can be used as a resource in quantum information processing and adds a valuable dimension to the applications of cloning machines.