Quantum Electrodynamics of graphene Landau levels in a deep-subwavelength hyperbolic phonon polariton cavity

TL;DR

This paper develops a theoretical framework for quantum electrodynamics involving graphene Landau levels in deep-subwavelength hyperbolic cavities, revealing polariton formation and hybridization effects influenced by quantum vacuum fluctuations.

Contribution

It introduces a novel theoretical approach to analyze light-matter interactions in ultrasmall hyperbolic cavities with graphene Landau levels, highlighting quantum vacuum effects.

Findings

Emergence of polaritons due to strong light-matter coupling.

Disentanglement of quantum vacuum effects from electrostatic interactions.

Hybridization between magnetoplasmons and cavity electromagnetic modes.

Abstract

The confinement of electromagnetic radiation within extremely small volumes offers an effective means to significantly enhance light-matter interactions, to the extent that zero-point quantum vacuum fluctuations can influence and control the properties of materials. Here, we develop a theoretical framework for the quantum electrodynamics of graphene Landau levels embedded in a deep subwavelength hyperbolic cavity, where light is confined into ultrasmall mode volumes. By studying the spectrum, we discuss the emergence of polaritons, and disentangle the contributions of resonant quantum vacuum effects from those of purely electrostatic interactions. Finally, we study the hybridization between magnetoplasmons and the cavity's electromagnetic modes.