Search
Now showing items 1-10 of 14
Transmissão de emaranhamento através de cadeias de spins
(Universidade Federal de São Carlos, 2018-04-25)
In this thesis we studied the transmission of entangled states in unmodulated spin chains using a slight modification in the XY isotropic model (XX model) that describes a one-dimensional spin-1/2 chain. We have shown that ...
Emaranhamento intrínseco em sistemas tipo-Dirac
(Universidade Federal de São Carlos, 2018-03-06)
Dirac equation is supported by a $SU(2) \otimes SU(2)$ group structure, such that its solutions describe two discrete degrees of freedom, intrinsic parity and spin, which in general are entangled. In this work we will ...
Formulações semiclássicas da mecânica quântica: uma análise do oscilador singular por meio do formalismo de Weyl-Wigner e trajetórias quânticas
(Universidade Federal de São Carlos, 2020-02-10)
The usual quantum mechanics formalism does not address relevant points of the semiclassical limit. In this work two theoretical approaches will be considered: Bohmian mechanics and the Weyl-Wigner formulation. The singular ...
Processos Paramétricos em eletrodinâmica quântica de cavidades.
(Universidade Federal de São Carlos, 2004-03-02)
In this thesis we study the interaction between an atom and a cavity mode submitted
to linear and parametric amplifications. The evolution operator of the system was derived
through the technique of time-dependent ...
Mecânica quântica no espaço de fase não-comutativo e aplicações em termodinâmica
(Universidade Federal de São Carlos, 2016-08-26)
In this work we study theoretical aspects arising from the fact of considering a
quantum theory with general relations of noncommutativity. Through the quantum
mechanics in phase-space formalism in the Wigner-Weyl ...
Coerência espectral da luz espalhada por átomos frios saturados
(Universidade Federal de São Carlos, 2020-02-27)
The spectrum of radiation resonantly scattered by a strongly-driven two-level system consists of three peaks called the Mollow’s triplet. In the case of cold atoms, we can approximate their energy level structure by a ...
Charge carrier dynamics and optoelectronic properties in quantum tunneling heterostructures
(Universidade Federal de São Carlos, 2021-09-17)
Semiconductor quantum tunneling heterostructures offer a wide range of applications as photosensors, lasers, and circuit elements. However, fundamental questions related to energy transfer mechanisms and the correlation ...
Estudo de algoritmos quânticos para resolução de equações diferenciais parciais
(Universidade Federal de São Carlos, 2022-05-02)
With great impact in various areas of engineering and mathematics, quantum computing is an emerging technology with one of its applications in resolving large-scale mathematical problems, such as optimization and simulation. ...
O efeito Zeno no controle da evolução adiabática de um sistema quântico a partir de medidas não-seletivas
(Universidade Federal de São Carlos, 2022-07-26)
The objective of the present work is to improve the performance of a Stimulated Raman Adiabatic Passage (STIRAP) in a 3-level system by applying successive non-selective measurements throughout the evolution (exploiting ...
Optimization and application of the quantum adiabatic theorem, and the quantum origin of classical interference
(Universidade Federal de São Carlos, 2022-03-29)
In this master’s thesis, we developed three different topics. In the first topic, we studied the quantum adiabatic brachistochrone method (QAB) for optimizing adiabatic dynamics. In the first part of this study, we reported ...