Noise effects in perfect transmission of quantum states

TL;DR

This paper investigates the robustness of a quantum state transmission scheme against stochastic noise, revealing that correlated noise can surprisingly enhance protocol efficiency.

Contribution

It analyzes the impact of un-correlated and correlated noise on perfect quantum state transmission, highlighting the robustness and potential benefits of correlated noise.

Findings

Protocol remains effective under reasonable disorder levels.

Correlated noise can improve transmission efficiency.

Robustness varies with noise correlation types.

Abstract

A recent scheme for perfect transmission of quantum states through quasi-one dimensional chains requires application of global control at regular intervals of time. We study the effect of stochastic noise in this control and find that the scheme is robust for reasonable values of disorder. Both un-correlated and correlated noise in the external control are studied and it is remarkably found that the efficiency of the protocol is much higher in presence of correlated noise.