Fichas
Quantum optics Set 5
Fichas del conjunto (17)
- 1Lorentzian shape(saturation broadening)- at high intensities curve is broaderned → more photons are scattered far from resonance
- 2Lambert-Beer Law (Atomic scattering cross section)Absorption of light: I(z)=I_0 exp(-σ_10 nz)
σ_10=(ħω_10 γ_10)/(2I_s ) (atomic scattering cross section) - 3Velocity selective coherent population trapping- beyond doppler and recoil cooling
- bring atom in a dark state
- velocity selective because of doppler effect - 4Forces on a two level atom in a light fieldspatial dependence is now taken into account
- 5Dissipative Forceis used for cooling and slowing atoms (all directed light fields have this force)
δ_Doppler=- (k_L ) ⃗∇; δ_eff=δ+δ_Doppler
for slow velocities:(F_diss ) ⃗≈F ⃗_0-β∇
F0 is constant; rest friction force depending on sign of δ - 6Reactive Forcecan be used for conservative trapping
(F_react ) ⃗(r ⃗ )=-∇u_opt (r ⃗ ); conservative force - 7Dissipative vs. Reactive Forcein general a light field has a dissipative and a reactive force part
for large detunings |δ|≫γ_10:
(F_diss ) ⃗∝I/δ^2
F ⃗_react∝ -∇I/δ - 8two level atom
- 9optical pumping
- 10BEC Expansion
- 11Mach Zehnder Interferometer
- 12Diffraction by grating
- 13Dark States
- 14Absorption imaging of ultracold atoms
- 15BEC with attractive interactions
- 16BEC in a harmonic trap
- 17BEC in optical lattices
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- El usuario ha eliminado su información de asignaturas Fichas sobre Quantum optics Set 5, creado por Usuario eliminado el 24/09/2017.
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- Creado por Tom Schobert · 21 sep 2017
- Copiado por Tom Schobert · 24 sep 2017
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