Physics – Quantum Physics
Scientific paper
2005-03-24
Physics
Quantum Physics
12 pages, 5 figures
Scientific paper
In the previous paper on this topic it was shown how, for a pulse of arbitrary shape and duration, the drive frequency can be analytically optimized to maximize the amplitude of the population oscillations between the selected two levels in a general many level quantum system. It was shown how the standard Rabi theory can be extended beyond the simple two-level systems. Now, in order to achieve the quickest and as complete as possible population transfer between two pre-selected levels, driving pulse should be tailored so that it produces only a single half-oscillation of the population. In this paper, this second (and final) step towards the controlled population transfer using modified (i.e. many level system) Rabi oscillations is discussed. The results presented herein can be regarded as an extension of the standard $\pi$-pulse theory - also strictly valid only in the two level systems - to the coherently driven population oscillations in general many level systems.
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