2024-02-062024-02-062021CORRÊA, Alexsandro Baia. O potencial efetivo via formalismo de integrais de trajetória. Orientador: Leandro Oliveira do Nascimento. 2021. 66 f. Trabalho de Curso (Licenciatura em Física) – Faculdade de Física, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, Belém, 2021. Disponível em: https://bdm.ufpa.br/jspui/handle/prefix/6725. Acesso em:.https://bdm.ufpa.br/jspui/handle/prefix/6725In the present work, we study the formalism of path integrals, both in Feynman’s and Schwinger’s formalism. We started by applying this formalism to simpler systems of quan tum mechanics such as the quantum harmonic oscillator, obtaining Green’s functions. After that, we apply the functional method in quantum field theory to calculate the effective potential of the λφ4 theory and build the renormalization group equation for this potential, determining the renormalized mass and coupling constant. Subsequently, we use the Matsu bara frequencies to insert thermal effects in the effective potential and make the connection between this object and thermodynamics. Based on this, we calculate the pressure of real bosonic particles, making an analogy with Stefan-Boltzmann’s Law.Acesso AbertoIntegrais de trajetóriaPotencial efetivoGrupo de renormalizaçãoFrequências de matsubaraCNPQ::CIENCIAS EXATAS E DA TERRA::FISICATrabalho de Curso - Graduação - Monografia