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Colisões atômicas controladas em eletrodinâmica quântica de cavidades : emaranhamento como medida da classicalidade do campo de radiação
(Universidade Federal de São Carlos, 2009-08-12)
In this dissertation we presente a study on the entanglement between two identical and noninteracting
two-level atoms, generated by their interaction with only a singl cavity filed mode.
We also show how to calculate the ...
Caracterização do módulo elástico por espectroscopia mecânica da liga Ti-13Nb-13Zr
(Universidade Federal de São Carlos, 2009-09-11)
In the present time the titanium and their alloys are begin widely studied in the field of
biomaterials because of its suitable mechanical properties such as low elastic
modulus, excellent corrosion resistance and high ...
Investigação por espectroscopia Mössbauer das fases formadas e sua influência na resistência à corrosão do aço inoxidável austenítico AISI 316L nitretado
(Universidade Federal de São Carlos, 2009-03-10)
The plasma nitriding is a technique that improves mechanical and tribological properties of metallic materials as hardness and wear. It improves also the corrosion resistance, because the nitrated layer is formed by phases ...
Simulações por dinâmica molecular de compostos do tipo ABO3 (SrTiO3 e CaTiO3)
(Universidade Federal de São Carlos, 2009-02-26)
Using the classical molecular dynamics simulations, Perovskites systems composed by oxides (ABO3), in particular SrTiO3 and CaTiO3, were performed. The titanates are easily prepared as polycrystalline ceramics; chemically ...
Estudo do modelo de Rabi no contexto de sistemas quânticos abertos
(Universidade Federal de São Carlos, 2009-01-27)
The Rabi Hamiltonian describes the interaction between a two-level atom and a single mode of the quantized electromagnetic field. In this work we study numerically and analytically the dynamics of the Rabi hamiltonian ...
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 experimental e numérico da força de levitação magnética em supercondutores de alta temperatura crítica
(Universidade Federal de São Carlos, 2009-09-30)
In this research work we propose, in general, to address the issue of magnetic levitation force between a superconducting material and a permanent magnet. This is a very current and relevant mainly from a technological ...
Estudos de propriedades de muitos corpos em sistemas confinados : simulacões via Monte Carlo Quântico
(Universidade Federal de São Carlos, 2009-08-28)
The Quantum Monte Carlo Method has been constituted in a powerful ab-initio tool which can afford accurate estimates of the ground-state properties of quantum many-body systems. With this subject in mind, we first present ...
Sistemas eletrônicos em duas dimensões : desordem e resposta dinâmica
(Universidade Federal de São Carlos, 2009-01-28)
In disordered systems the pinning strength on the carriers due to impurities or defects is one of the most important mechanisms that produce insulator behavior. A transition to a metal phase should occur if a driving field ...
Interação da matéria de vórtices com estruturas de defeitos : detecção das primeiras penetrações
(Universidade Federal de São Carlos, 2009-08-07)
This thesis results from a systematic study of the interactions between penetrated vortices and pinning centers carried out on structured superconductors films of YBCO, Nb and Pb. A regular array of pinning centers (antidots, ...