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Teoria do funcional da densidade acoplada ao modelo de Hubbard de uma banda aplicada ao supercondutor La2−xSrxCuO4
(Universidade Federal de Santa Maria, 2020-09-15)
In this work we present the results of a methodology that combines first-principle Density
Functional Theory calculations with the Green’s functions method in order to treat strongly
correlated electronic systems. The ...
Um pipeline de redução de dados espectroscópicos para eventos de quilonova
(Universidade Federal de Santa Maria, 2020-11-09)
This work presents the process of making a pipeline for the reduction of longslit spectroscopic
data, acquired with the GMOS instrument of the Gemini Observatory as part of the optical
follow-up of kilonovae candidates. ...
Pseudogap e energia cinética de supercondutores não convencionais descritos por um modelo de Hubbard em duas dimensões
(Universidade Federal de Santa Maria, 2020-03-30)
In conventional superconductors described by the Bardeen-Cooper-Schrieffer (BCS) Theory,
the transition from the normal to the superconducting state is accompanied by a reduction
in the potential energy and an increase ...
Sistemas magnéticos com interações competitivas: uma abordagem de campo médio com clusters
(Universidade Federal de Santa Maria, 2020-04-27)
We study a model of localized spins which can assume three different states, S = 0 and
1, with two competing interactions: a antiferromagnetic first neighbour interaction (JA)
and a three body interaction between third ...
Estudo experimental de recursos quânticos usando os computadores quânticos da IBM
(Universidade Federal de Santa Maria, 2021-02-26)
Bell-diagonal states are extremely important for understanding the dynamics and applications
of some quantum resources. Quantum properties such as steering, entanglement,
and coherence, among others, can be used as ...
Dinâmica de redes genéticas regulatórias do destino celular em resposta a dano ao dna contemplando senescência, autofagia e apoptose
(Universidade Federal de Santa Maria, 2021-03-24)
How a cell determines a given phenotype upon damaged DNA is an open problem. Cell
fate decisions happen at cell cycle checkpoints and it is becoming clearer that the p53
pathway is a major regulator of cell fate decisions ...
Complementariedade, emaranhamento, incerteza e invariância de Lorentz
(Universidade Federal de Santa Maria, 2021-05-20)
Bohr’s complementarity principle was introduced as a qualitative statement about quantum
systems, which have properties that are equally real, but mutually exclusive. This
principle, together with the uncertainty principle, ...
Estabilização de Skyrmions magnéticos em multicamadas de Pt/Co/Ta depositadas em nanodomos
(Universidade Federal de Santa Maria, 2020-03-27)
Magnetic skyrmions are non-trivial spin textures that resist external disturbances and are promising candidates for next generation magnetic recording devices. However, a major challenge in the realization of devices based ...
Solução analítica do modelo 2-estrelas com graus correlacionados
(Universidade Federal de Santa Maria, 2021-10-27)
In this work, we study an important tool to model complex networks built from empirical data,
wich are exponential random graphs. We propose a model to generate random graphs,
whose hamiltonian enables to impose generic ...
Variações em curta e longa escalas de tempo do perfil em duplo-pico de Ha da Galáxia Pictor A
(Universidade Federal de Santa Maria, 2021-10-27)
In the current paradigm nuclear activity in a galaxy happens when the central Supermassive
Black Hole (SMBH) is being fed by an accretion disk of gas. The spectral signature of the
accretion disk is the presence of broad ...