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Master's Dissertation
DOI
https://doi.org/10.11606/D.76.2014.tde-18092014-155243
Document
Author
Full name
Cora Castelo Branco de Francisco Reynaud dos Santos
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2014
Supervisor
Committee
Muniz, Sérgio Ricardo (President)
Araujo, Luis Eduardo Evangelista de
Miranda, Marcio Heraclyto Gonçalves de
Title in Portuguese
Imagem por contraste de fase próximo à ressonância
Keywords in Portuguese
Condensados de Bose-Einstein
Imagem de absorção
Imagem de contraste de fase
Técnicas de imagem
Abstract in Portuguese
Tendo em vista experimentos envolvendo o estudo da dinâmica de gases quânticos aprisionados, visando a simulação quântica de sistemas complexos, este trabalho discute a implementação e o estudo da técnica de imagem dispersiva, por contraste de fase, e a compara com o método de imagem por absorção óptica. A implementação da nova técnica foi feita em um regime não convencional de dessintonia, explorando a região proxima da ressonância atômica, onde se deve levar em conta o efeito da absorção, além da mudança de fase, do campo elétrico do laser de prova, após interagir com os átomos. Portanto, este trabalho apresenta não só a implementação de uma nova técnica experimental, mas também um modelo simples para interpretar os dados obtidos nesse novo regime.
Title in English
Phase contrast imaging near resonance
Keywords in English
Absorption imaging
Bose Einstein condensates
Imaging techniques
Phase contrast imaging
Abstract in English
Envisioning experiments involving the dynamics of trapped quantum gases, towards the quantum simulation of complex systems, this work presents the implementation and study of a dispersive imaging technique, by phase contrast, and compares it to absorption imaging. The implementation of this new technique in our laboratory was done in a non conventional range of detunings, exploring the region near atomic resonance, where absortion effecs need to be taken into account, in addition to the phase shift, introduced in the electric field of the probing laser, after interacting with the atoms. Therefore, this work presents not only the implementation of a new experimental technique, but also a simple model to interpret the dada obtained in this new regime.
 
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Publishing Date
2014-09-23
 
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