Quantum & Atomic Physics
3 terms
Lamb Shift
Quantum & Atomic Physics
MHz or eV
A small energy difference between the 2s1/2 and 2p1/2 states of hydrogen caused by quantum vacuum fluctuations.
ΔE_Lamb ≈ 1057 MHz (for Hydrogen 2s1/2 and 2p1/2)
Laser Cooling
Quantum & Atomic Physics
μK or nK (Temperature)
A technique using photon momentum from red-detuned laser beams to slow down moving gas atoms, cooling them to microkelvin temperatures.
F_force = ℏ k γ (I / I_sat) / (1 + 4 (Δ ± k v)² / γ²)
Lyman Series
Quantum & Atomic Physics
Ultraviolet Wavelengths (nm)
The hydrogen spectral series resulting from electron transitions dropping from higher excited states down to the ground state (n=1).
1 / λ = R_H (1 / 1² - 1 / n_i²), n_i = 2, 3, 4...