The main properties of the dynamics of matter fields in spherically symmetric spacetimes have been analyzed in this work,to do this, we take into account the metric for the different space-times, which will be encoded ...

One of the posible explanations for the accelerated expansion of the universe is the existence of dark energy. Different mathematical models have been proposed for it, among those models the simplest one is that which ...

In this dissertation, after a brief review of the elements present in differential geometry, we present Penrose’s Singularity Theorem (1965) and rewrite it from the perspective of disformal transformations. Without ...

This dissertation investigates aspects of integrability in (1+1)-dimensional field theories, with emphasis on the coupled Thirring model. Initially, the foundations of classical integrability are presented, including ...

The Glioblastoma Multiforme (GBM) is an aggressive brain cancer with a low survival rate. Non-invasive brain stimulation is a promising approach for treating GBM, but there is still much to be learned about its effectiveness ...

Differential spectrophotometry of transiting Hot-J´upiters has shown to be a promising technique to characterize the upper atmosphere of these planets, without the necessity of spatially resolving it from its host star. ...

Nesse trabalho fazemos um estudo sobre o campo escalar com massa na presença de potenciais e/ou fontes externos espacialmente localizadas. Os modelos considerados simulam a presença de fronteiras materiais assim como cargas ...

Neste trabalho faremos um estudo sobre as coordenadas vestidas (ou renormalizadas) e suas aplicações. Estas coordenadas permitem a construção de estados vestidos, que são definidos de tal forma a ter a correta propriedade ...

Titanium dioxide (TiO2) is a highly investigated semiconductor material renowned for its exceptional optical and catalytic properties, making it an ideal candidate for various applications, including sensors, antibacterial ...