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Mostrando ítems 31-40 de 81
Efeitos de spin em diodos de tunelamento ressonante não-magnéticos tipo-n
(Universidade Federal de São Carlos, 2007-02-27)
In this work, we have investigated spin polarization effects in asymmetric ntype
resonant tunneling diodes (RTDs). When subjected to an external magnetic field parallel
to the tunnel current, the Zeeman effect leads to the ...
Estrutura de vidros fosfatos ternários no sistema Pb-Al metafosfato
(Universidade Federal de São Carlos, 2008-02-26)
In this work, the Pb-Al meta-phosphate glass system (1-x) Pb(PO3)2 xAl(PO3)3
was studied, with the aim of determining the structural effects induced in the glass network by
the substitution of Pb by Al. In the series of ...
Estudo da dinâmica de portadores em diodos de tunelamento ressonante tipo-p
(Universidade Federal de São Carlos, 2007-02-27)
Photoluminescence spectroscopy has been used to provide important insight
on the tunneling dynamics of carriers in double barrier diodes. In this work, we have
performed time-resolved photoluminescence measurements in ...
Caracterização elétrica e magnética de Fe granular embebido em matriz de ZnSe
(Universidade Federal de São Carlos, 2008-03-13)
Electric and magnetic properties of nanoscopic clusters of iron immersed in Zinc
Selenide were studied in this work. The system presents superparamagnetic behavior with a
weak thermally activate ferromagnetic interaction. ...
Engenharia de hamiltonianos e aplicações em teoria da informação quântica
(Universidade Federal de São Carlos, 2008-03-28)
Um modelo consistente para o processo de fotocontagem contínua e medidas de emaranhamento de sistemas quânticos de variáveis contínuas.
(Universidade Federal de São Carlos, 2005-02-10)
This dissertation embraces two trends of research in modern quantum optics. The first of
them is connected to the photodetection theory, particularly to the continuous measurement
theory developed by Srinivas and Davies ...
Estudo das técnicas de obtenção de Hamiltonianos efetivos em Óptica Quântica
(Universidade Federal de São Carlos, 2009-02-18)
In the Quantum Optics area, the construction of effective hamiltonian is a matter of great importance, since from them we can generate and manipulate quantum states and logical operations. In this work we discuss 3 approximate ...
Estudo por espalhamento Raman dos efeitos de desordem química e estrutural no espectro de fônos do InSb indentado
(Universidade Federal de São Carlos, 2004-07-20)
Abordagem via integrais de trajetória do processo de troca e dissipação de energia num sistema composto por dois osciladores harmônicos dissipativos acoplados - o modelo duplicado de Caldeira & Leggett.
(Universidade Federal de São Carlos, 2005-03-11)
In this work, we analyse the dissipation and interchange of energy in a
system composed by two harmonic oscillators, each one associated with a thermal
reservoir.
To this end, we employ the Caldeira & Leggett approach, ...
Solução de um modelo de vértices assimétrico de três estados.
(Universidade Federal de São Carlos, 2005-03-29)
In this work we first review some of the techniques relevant to the theory of two-dimensional integrable models. We apply the Quantum Inverse Scattering approach to a class of three-state vertex model with both closed and ...