Uncoupled Dark States Can Inherit Polaritonic Properties

Area of Science:

• Quantum optics
• Solid-state physics
• Materials science

Background:

• Collective strong coupling between quantum emitters and electromagnetic fields creates hybrid light-matter states called polaritons.
• Typically, only a fraction of excitations couple to the light field, leaving many 'dark states' with pure excitonic character.

Purpose of the Study:

• To theoretically investigate the nature and behavior of dark states in hybrid light-matter systems.
• To explore whether dark states can exhibit delocalized properties and their potential role in excitation transfer.

Main Methods:

• Theoretical modeling of quantum emitters interacting with a discrete electromagnetic field spectrum.
• Analysis of excitation dynamics and delocalization in the presence of radiative losses.

Main Results:

• Demonstrated that dark states can possess a delocalized character, analogous to polaritons, even without a photonic component.
• Showcased that this delocalization is contingent upon the electromagnetic field having a discrete spectrum.
• Identified that dark states can be more effective than polaritons in excitation transfer when radiative losses dominate.

Conclusions:

• Dark states in discrete electromagnetic fields can exhibit polariton-like delocalization.
• These dark states offer a novel pathway for efficient excitation transfer in hybrid quantum systems, particularly under radiative loss conditions.