Vectorial polaritons in the quantum motion of a levitated nanosphere

The strong coupling between photons and bosonic excitations in matter produces hybrid quasiparticle states known as polaritons1–3. Their signature is the avoided crossing eigenfrequencies of coupled system illustrated by Jaynes–Cummings Hamiltonian4. It has been observed quantum electrodynamics experiments based on atoms5,6, ions7, excitons8–10, spin ensembles11,12 superconducting qubits13. In cavity optomechanics, polariton modes originate from quantum-coherent a macroscopic mechanical vibration to radiation field14,15. Here we investigate polaritonic motion an optically levitated nanosphere16–22 regime. particle trapped high vacuum optical tweezer strongly single mode coherent scattering photons23–27. two-dimensional define optomechanical with three degrees freedom. strong-coupling regime, observe light–mechanical vectorial nature. Our results pave way towards protocols for information transfer photonic phononic components represent step demonstration entangled at room temperature. A nanosphere that forms freedom, which supports