# Temperature effects on quantum cloning of states and entanglement

## TL;DR

This paper investigates how thermal environments affect the performance of quantum cloning and entanglement cloning, highlighting differences from ideal, isolated scenarios in qubit systems.

## Contribution

It provides a comparative analysis of the impact of thermal noise on various quantum cloning transformations and entanglement cloning.

## Key findings

- Thermal coupling degrades cloning fidelity.
- Different cloning methods show varied robustness to thermal effects.
- Contrasts with ideal cloning performance are highlighted.

## Abstract

Performances of the symmetric universal and phase-covariant cloning transformations and entanglement cloners -- qubit case -- are investigated when the initial state of the hardware or the original state to be cloned is weakly coupled to a thermal environment. Different behaviors of each of these transformations are analyzed and contrasted with the ideal cases.