Chaos in one-dimensional lattices under intense laser fields

Details Chaos in one-dimensional lattices under intense laser fields Chaos in one-dimensional lattices under intense laser fields

1999-10-20

arxiv.org/abs/cond-mat/9910302v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, RevTex 3.0, EPSF (6 figures), to appear in Europhys. J. B

Scientific paper

10.1007/s100510050137

A model is investigated where a monochromatic, spatially homogeneous laser field interacts with an electron in a one-dimensional periodic lattice. The classical Hamiltonian is presented and the technique of stroboscopic maps is used to study the dynamical behavior of the model. The electron motion is found to be completely regular only for small field amplitudes, developing a larger chaotic region as the amplitude increases. The quantum counterpart of the classical Hamiltonian is derived. Exact numerical diagonalizations show the existence of universal, random-matrix fluctuations in the electronic energy bands dressed by the laser field. A detailed analysis of the classical phase space is compatible with the statistical spectral analysis of the quantum model. The application of this model to describe transport and optical absorption in semiconductor superlattices submitted to intense infrared laser radiation is proposed.

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