Hybrid Quantum Cloning Machine

TL;DR

This paper introduces hybrid quantum cloning machines, combining existing cloning transformations to create new types, including state-dependent and universal versions, with specific fidelity properties and applications.

Contribution

It presents the concept of hybrid quantum cloning machines, detailing their types, construction, and fidelity characteristics, expanding the scope of quantum cloning methods.

Findings

Hybrid quantum cloning machines can be tailored for specific input states.

Constructed an asymmetric universal quantum cloning machine with distinct output fidelities.

Fidelities of the hybrid machine outputs are approximately 5/6.

Abstract

In this work, we introduce a special kind of quantum cloning machine called Hybrid quantum cloning machine. The introduced Hybrid quantum cloning machine or transformation is nothing but a combination of pre-existing quantum cloning transformations. In this sense it creates its own identity in the field of quantum cloners. Hybrid quantum cloning machine can be of two types: (i) State dependent and (ii) State independent or Universal. We study here the above two types of Hybrid quantum cloning machines. Later we will show that the state dependent hybrid quantum-cloning machine can be applied on only four input states. We will also find in this paper another asymmetric universal quantum cloning machine constructed from the combination of optimal universal B-H quantum cloning machine and universal anti-cloning machine. The fidelities of the two outputs are different and their values lie in the neighborhood of ${5/6} $