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Cavity QED Strong Coupling — Vacuum Rabi Splitting

Tune the atom-cavity coupling strength g against the cavity loss rate κ and atom decay rate γ, and watch the transmission spectrum split from a single resonance into the vacuum Rabi doublet.

Quantum Physics3DAdvanced60 FPS

A single atom inside a cavity that strongly confines one field mode can exchange a single quantum of energy with the cavity photon many times before either decays. This simulator lets you tune the coupling strength g against the cavity's photon-loss rate κ and the atom's decay rate γ, and watch the probed transmission spectrum transition from one resonance peak (weak coupling, g below κ and γ) into a clearly split vacuum Rabi doublet (strong coupling, g above κ and γ) — alongside a 3D view of the atom-cavity system showing coherent energy exchange versus rapid irreversible decay.

⚙ Under the hood

Tune the atom-cavity coupling strength g against the cavity loss rate κ and atom decay rate γ, and watch the transmission spectrum split from a single resonance into the vacuum Rabi doublet as g crosses into strong coupling, alongside a 3D view of the coherent energy exchange between atom and cavity photon.

cavity QEDvacuum Rabi splittingstrong couplingJaynes-Cummingsdressed statesquantum opticstransmission spectrumatom-cavity coupling

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install