ΔX: — | ΔP: — | ΔX·ΔP: — | dB: —
Coherent state: ΔX=ΔP=1/2 (Heisenberg limit). Squeezed: ΔX=e^(−r)/2, ΔP=e^r/2. Product always ≥1/4. LIGO uses ~15dB squeezing.