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Single Gaussian well. Total number of electrons in the well, normalized to its value at , for different values of the filling fraction: (solid line), (dotted), (dashed), and (dot dash). Inset: Time evolution of the dipole for .
Time evolution of the total number of electrons for a series of four laser pulses; .
Evolution of the average velocity for an array of quantum wells with dc bias. Inset: velocity distribution of the electron population at , 500, 1000, and 2500. Velocity is measured in units of .
Evolution of the average velocity for an array of quantum wells with dc bias, in the case of two laser pulses. The dashed line represents the evolution of the dc field, in arbitrary units.
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