Analysis and minimization of bending losses in discrete quantum networks

TL;DR

This paper investigates how bends in two-dimensional quantum networks affect information transfer fidelity and demonstrates that introducing defects can effectively mitigate bending-induced losses.

Contribution

It provides a theoretical analysis of bending losses in quantum networks and proposes a defect-based method to control these losses.

Findings

Bending significantly reduces transfer fidelity in quantum networks.

Defects can be used to control and reduce bending losses.

Results are relevant for physical implementations with geometric imperfections.

Abstract

We study theoretically the transfer of quantum information along bends in two-dimensional discrete lattices. Our analysis shows that the fidelity of the transfer decreases considerably, as a result of interactions in the neighbourhood of the bend. It is also demonstrated that such losses can be controlled efficiently by the inclusion of a defect. The present results are of relevance to various physical implementations of quantum networks, where geometric imperfections with finite spatial extent may arise as a result of bending, residual stress, etc.