Cavity-modified Zeeman effect via spin-polariton formation.

Area of Science:

• Quantum Optics
• Solid-State Physics
• Spectroscopy

Background:

• The electronic spin Zeeman effect describes how electron spins interact with magnetic fields.
• Optical cavities can strongly influence quantum systems, potentially modifying fundamental interactions.
• Understanding these interactions is crucial for developing advanced quantum technologies.

Purpose of the Study:

• To investigate the electronic spin Zeeman effect in a spin-1/2 system coupled to an optical cavity and a static magnetic field.
• To analyze the interplay between cavity magnetic fields and canonical spin Zeeman interactions.
• To explore the formation and signatures of spin-polariton states.

Main Methods:

• Derivation of an effective spin-polariton Hamiltonian from the Pauli-Fierz Hamiltonian.
• Application of first-order quasi-degenerate perturbation theory beyond the dipole approximation.
• Analysis of spin-polariton signatures using electron paramagnetic resonance spectroscopy.

Main Results:

• The spin Zeeman effect is significantly modified by the presence of the optical cavity field.
• Formation of spin-polariton states arises from the combined influence of cavity and external magnetic fields.
• Cavity-induced modifications to the electronic g-factor were observed.

Conclusions:

• Spin-polariton states play a key role in modifying the electronic spin Zeeman effect.
• The study provides insights into cavity-modified quantum electrodynamics and spin physics.
• Electron paramagnetic resonance spectroscopy can detect these cavity-induced spin-polariton signatures.