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Excitation of Small Quantum Systems by High-Frequency Fields

Naama Brenner·Shmuel Fishman
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Abstract

The excitation by a high frequency field of multi--level quantum systems with a slowly varying density of states is investigated. A general approach to study such systems is presented. The Floquet eigenstates are characterized on several energy scales. On a small scale, sharp universal quasi--resonances are found, whose shape is independent of the field parameters and the details of the system. On a larger scale an effective tight--binding equation is constructed for the amplitudes of these quasi--resonances. This equation is non--universal; two classes of examples are discussed in detail.

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Naama Brenner, Shmuel Fishman. 1996-05-20. Excitation of Small Quantum Systems by High-Frequency Fields. https://doi.org/10.1103/physrevlett.77.3763

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