Optical resonance by a few-cycle pulse: an improved analytical solution

Avoiding the rotating-wave approximation (RWA), we investigate analytically the dynamics of a two-level atom in an optical-frequency pulse of a few-cycle duration. We present the exact analytical solution for the first-order non-RWA contribution to the known RWA dynamics. Our solution is an improvem...

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Bibliographic Details
Published in:Optics communications 2003-12, Vol.228 (1), p.111-117
Main Authors: Parzyński, R., Sobczak, M.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Atomic properties and interactions with photons
Exact sciences and technology
Few-cycle pulses
Multiphoton ionization and excitation to highly excited states (e.g., rydberg states)
Multiphoton ionization and excitation to highly excited states (eg, Rydberg states)
Non-RWA
Optical resonance
Photon interactions with atoms
Physics
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Summary:Avoiding the rotating-wave approximation (RWA), we investigate analytically the dynamics of a two-level atom in an optical-frequency pulse of a few-cycle duration. We present the exact analytical solution for the first-order non-RWA contribution to the known RWA dynamics. Our solution is an improvement of the recent solution by Genkin [Phys. Rev. A 58 (1998) 758]. The two solutions are compared and the difference between them is found to be non-negligible for certain evolution moments. Generally, the solution of Genkin is shown to give underestimated results for the measurable population difference between a pair of atomic levels.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2003.09.072