Noise effects for the Depolarizing Channel

TL;DR

This paper investigates how noise influences the capacity and fidelity of the depolarizing quantum channel, finding some enhancement in fidelity but no clear evidence of noise-induced capacity increase.

Contribution

It explores the potential for noise to enhance quantum channel capacity and fidelity, providing insights into stochastic resonance effects in depolarizing channels.

Findings

Fidelity of the depolarizing channel can be enhanced by noise.

No conclusive evidence of noise-enhanced capacity was observed.

The study contributes to understanding noise effects in quantum communication channels.

Abstract

The possibility of stochastic resonance of a quantum channel and hence the noise enhanced capacity of the channel is explored by considering the depolarizing channel. The fidelity of the channel is also considered. Although there is no clear evidence for noise enhanced capacity found, there is enhancement for the fidelity for the depolarizing channel. PACS number(s): 05.40.-a, 03.67.Hk