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Avoided crossing in laser-induced continuum structures

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Magunov,  A. I.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Rotter,  I.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Citation

Magunov, A. I., Rotter, I., & Strakhova, S. I. (2002). Avoided crossing in laser-induced continuum structures. Laser Physics, 12(2), 429-434. Retrieved from http://www.maik.ru/cgi-bin/search.pl?type=abstract&name=lasphys&number=2&year=2&page=429.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-3826-2
Abstract
The quasi-level avoided crossing in the laser-induced continuum structures is traced theoretically as a function of the intensities of the strong laser fields. We study, in the adiabatic regime, the effects induced by two strong laser fields in the continuum of the H atom. In the photoionization spectra of the probe field from the ground Is state, the coupling to the 2s, 5s, 5d, and 5g states is considered. Under certain conditions, the quasi-levels cross and the S-matrix has a double pole related to branch point in the complex plane. Although the number of these branch points is very small, they determine the dynamics of the system in a decisive manner.