Rabi Frequency
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Characterization of the main frequency shifts for the brazilian 133Cs atomic beam frequency standard
In order to evaluate an atomic clock, it is important to determine the main frequency shifts caused by external fields, device imperfections, etc. Scanning the frequency of the main oscillator, the Ramsey fringe is obtained and used to determine the main shifts. The gravitational shift (10-17), second order Doppler (1.65×10-13), Black-Body radiation shift (
Brazilian Journal of Physics. Publicado em: 2005-12
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2. Relógio atômico a feixe efusivo de 133Cs: estudo da estabilidade e da acuracia como função do deslocamento da frequência atômica devido ao efeito zeeman de segunda ordem, ao cavity pulling e ao rabi pulling / A 133Cs Atomic Beam Clock: study of its accuracy and stability as a function of the atomic frequency shift due to the second order zeeman effect, the cavity pulling and the rabi pulling
Since 1967, the definition of the second is based on the atomic properties of the 133Cs atom. The device that realises this definition is an atomic clock. In this work, we present the progress made in the last year on Brazilian scientific time and frequency program. The aim of this dissertation work is the caracterization of our standard. We report the major
Publicado em: 2003
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3. Espectroscopia Ãptica nÃo linear em sistemas atÃmicos envolvendo nÃveis de Rydberg
In this thesis we study nonlinear optical effects in alkali vapors, in which Rydberg levels play the role of near resonant intermediate levels, focusing our attention in processes such as: four wave mixing (FWM), two photon absorption, sum frequency generation (SF) and difference frequency generation (DF). We analyze a FWM process with two-photon transitions
Publicado em: 2002
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4. Construção de um sistema experimental para desaceleração de átomos. / Construction of an experimental system for stopping atoms.
This work presents the development and test of an experimental set-up which allows to produce a very strong slow motion atomic beam. We discuss the calculation and construction of the solenoid to compensate the Doppler effect arising during the deceleration process, vacuum chambers, the oven which produces the atomic beam and the optical system used. We have
Publicado em: 1991