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How to use this applet

(a detailed description is available in German, see previous site)


  1. The topmost frame plots the probability density of both levels. Their sum is aways equal to one.

  2. The second frame displays real and imaginary part of the probability amplitude for a transition from level |1> to level |2>. The real part is nonzero for a detuned stimulation


  4. The last plotter displays the pulse that excites the two level system. At runtime, the pulse is slowly overwritten to indicate the current level of the electric field.


  6. If there is no detuning, the fast frequency of the pulse fits exactly to the energy gap of the level.

  7. The attenuation knob modifies the (phenomenological) environment of the two level system (dissipation, perturbation). T2 is the rate of dephasing (attenuation of #961;12). Including T1 results in a supplementary attenuation of ρ11 and ρ22.

  8. To save your simulation results, click 'show data'. The data is tab-seperated.


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Auxiliary Functions