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|Type:||Artigo de periódico|
|Title:||Dynamics Of Population Of A Four-level Atom Due To One- And Three-photon Processes|
|Abstract:||The Schrödinger equation in the rotating-wave approximation has been solved nonperturbatively to study the temporal behavior of the occupation probabilities of different levels of a four-level atom interacting with four arbitrarily intense laser fields, such that the frequency of one of them equals the sum of the other three. The three-photon-excitation population dynamics, which is already complex, is strongly modified by one-photon excitation and detunings. Under certain conditions the three-photon excitation traps the population in the state initially populated; the population starts flowing into other states when one-photon excitation is also operative. © 1984 The American Physical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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