Doppler cooling limit: T_D = ℏΓ/(2 k_B) (Hansch-Schawlow 1975)

Layer 1 — Physicsin the ultracold-atoms subtree

Hansch-Schawlow 1975 / Wineland-Itano 1979 proposal; Chu 1985 experimental demonstration of optical molasses: six red-detuned counter-propagating laser beams (each at δ ≈ −Γ/2 below the atomic resonance) create a velocity-damping force F =…

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