Physics – Quantum Physics
Scientific paper
1998-10-05
Phys.Rev.A59:2886-2893,1999
Physics
Quantum Physics
8 pages with 10 figures submitted to Physical Review A
Scientific paper
10.1103/PhysRevA.59.2886
Avoided crossings are common in the quasienergy spectra of strongly driven nonlinear quantum wells. In this paper we examine the sinusoidally driven particle in a square potential well to show that avoided crossings can alter the structure of Floquet states in this system. Two types of avoided crossings are identified: on type leads only to temporary changes (as a function of driving field strength) in Floquet state structure while the second type can lead to permanent delocalization of the Floquet states. Radiation spectra from these latter states show significant increase in high harmonic generation as the system passes through the avoided crossing.
Reichl Linda E.
Timberlake Todd
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