Buscar
Itens para a visualização no momento 1-10 of 14
Processos quânticos em cavidades com a geometria variável.
(Universidade Federal de São Carlos, 2004-03-11)
In this thesis, we study the quantum de ection of ultracold particles by mirrors, the shrinking of free wave packets, the tunnelling of narrow Gaussian packets through delta potentials and the entanglement between the modes ...
O papel da interação elétron-elétron no regime Hall quântico interio.
(Universidade Federal de São Carlos, 2004-04-02)
Experimental and theoretical studies of the aspects of particle-like and collective behavior
of electrons in the proximity of the edges of two-dimensional (2DES) and quasi-one-dimensional
(Q1DES) systems, named quantum ...
Engenharia de interações fônon-fóton-matéria mediadas por um campo clássico.
(Universidade Federal de São Carlos, 2004-04-30)
In this work we consider the problem of a three-level trapped ion inside a high-
Q cavity. We study the process of phonon-foton-matter interaction mediated by a
classical field. We are particularly interested in the ...
Estudo sistematico das propriedades termodinâmicas e criticalidade de filmes finos e super-redes magnéticas.
(Universidade Federal de São Carlos, 2004-12-10)
In this work we will study through the differential operator technique the surface
effect in anisotropic spin ½ quantum Heisenberg model, through theory of effective field
(EFT), of a two-spins cluster, in case of simple ...
Dispersão dielétrica em materiais ferroelétricos.
(Universidade Federal de São Carlos, 2004-12-13)
In the last decades, the high frequency dielectric response has been one of
the most studied issues in the ferroelectricity area. The main dielectric
characteristic is the strong dependence of the dielectric parameters ...
Magnetorresistência túnel ressonante e acoplamento magnético em heteroestruturas epitaxiais.
(Universidade Federal de São Carlos, 2004-10-29)
In the context of spin electronics, this doctorate thesis presents an
experimental study of spin polarized transport in epitaxial heterostructures as planar
magnetic tunnel junctions formed by semiconductors and metallic ...
Estudo do efeito da correlação do alvo no espalhamento de elétrons por moléculas pequenas na faixa de energias baixas e intermediária.
(Universidade Federal de São Carlos, 2004-03-26)
In this present work, we have carried out a theoretical investigation on the
influence of the target electronic correlation on electron elastic scattering by molecules.
Calculated differential, integral and momentum-transfer ...
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)
Dinâmica de coerência e decoerência de estados em redes de osciladores quânticos dissipativos.
(Universidade Federal de São Carlos, 2004-07-02)
In this thesis we studied the coherence and decoherence dynamics of states in
a network of dissipative quantum oscillators. The coherence dynamics refers to
the swap and recurrence process of states between the oscillators ...
Efeitos da interação de plasma na absorção ótica em super-rede randômica de pontos quânticos.
(Universidade Federal de São Carlos, 2004-09-13)
In this work the ground and first excited states of the electron are calculated
in interacting one-dimensional, two-dimensional lattices and multilayers
of cylindrical quantum dots containing at the most an electron and ...