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Phys. Rev. B 47, 6795–6798 (1993)

Nonperturbative resonances in periodically driven quantum wells

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Björn Birnir
Mathematics Department, University of California at Santa Barbara, Santa Barbara, California 93106
University of Iceland, Science Institute 3, Dunhaga, 107 Reykjavik, Iceland

Bryan Galdrikian
Physics Department, University of California at Santa Barbara, Santa Barbara, California 93106

Rainer Grauer
Mathematics Department, University of California at Santa Barbara, Santa Barbara, California 93106

Mark Sherwin
Physics Department, University of California at Santa Barbara, Santa Barbara, California 93106

Received 19 November 1992; published in the issue dated 15 March 1993

Energy absorption characteristics are computed for a classical and a quantum model of an infinite square well, as a function of driving amplitude and frequency. Nonperturbative resonances are observed corresponding to the replacement of states localized in phase space by more extended states. Their presence is predicted by avoided crossings in the quasienergy spectrum of the Floquet operator. The conditions under which these resonances occur can be realized in experiments on GaAs/AlxGa1-xAs quantum wells in intense far-infrared radiation.

© 1993 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.47.6795
DOI:
10.1103/PhysRevB.47.6795
PACS:
73.20.Dx, 05.45.+b
 
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