Nuclear Spin Isomers and the Pauli Principle in Polaritonic Chemistry

TL;DR

This paper explores how the Pauli principle and nuclear spin isomerism influence collective light-matter interactions in polaritonic chemistry, using numerical and analytical models for ammonia molecules in an infrared cavity.

Contribution

It provides the first detailed analysis of the effects of the Pauli principle and nuclear spin isomerism on polaritonic systems, combining numerical and analytical approaches.

Findings

The Pauli principle and nuclear spin isomerism significantly alter collective light-matter coupling.

Numerical description of two ammonia molecules demonstrates these effects.

Analytical model generalizes the results to molecular ensembles.

Abstract

The Pauli principle has far-reaching consequences in quantum physics. Here, we investigate, for the first time, its implications, together with nuclear spin isomerism, in polaritonic chemistry. We first present an accurate numerical description in a realistic situation of two $^{14}$NH$_3$ molecules, existing as ortho and para spin isomers, in an infrared cavity. Then, we generalize these results using an analytical model for molecular ensembles. Our findings undoubtedly demonstrate that the Pauli principle and nuclear spin isomerism significantly reshape collective light-matter coupling.