Quantum information processing attributes of J-aggregates

TL;DR

This paper investigates the quantum information processing capabilities of J-aggregates, analyzing their entanglement properties and optical responses to demonstrate their potential as robust energy channels.

Contribution

It introduces a detailed analysis of entanglement measures and optical responses in J-aggregates, linking them to quantum information processing attributes.

Findings

J-aggregates exhibit significant entanglement suitable for quantum information tasks.

The third order optical response scales with exciton delocalization, indicating multipartite entanglement.

J-aggregates can serve as robust channels for large-scale energy propagation.

Abstract

We examine the unique spectroscopic features which give rise to quantum information processing attributes of one-dimensional J-aggregate systems, and as revealed by entanglement measures such as the von Neumann entropy, Wootters concurrence and Wei-Goldbart geometric measure of entanglement. The effect of dispersion and resonance terms in the exciton-phonon interaction are analyzed using Green function formalism and present J-aggregate systems as robust channels for large scale energy propagation for a select range of parameters. We show that scaling of the third order optical response $\chi^{(3)}$ with exciton delocalization size provides an experimentally demonstrable measure of quantifying multipartite entanglement in J-aggregates.