W-Type Atomic System (Physics Corrected)
Excited manifold
(degenerate)
(degenerate)
Ground manifold
(degenerate)
(degenerate)
Key Physics: The W-shape comes from allowed transitions, not energy differences.
Ground states |sl⟩ and |sr⟩ are truly degenerate (identical energy), as are excited states |el⟩, |e0⟩, |er⟩.
The horizontal background lines show equal energy levels. Control field modifies transition rules by coupling excited states to higher energy manifolds like 6S₁/₂.
Control Panel
SWAP Mode
All transitions active. SPRINT mechanism enables state exchange.
1. Photon approaches atom
2. Atom absorbs photon (|sr⟩ → |e0⟩)
3. Quantum interference in emission
4. Atom emits to |sl⟩ + photon (different mode)
Current State
Atom in |sr⟩ ground state. Control field OFF: all W-system transitions available for SPRINT/SWAP operations.