IF - Instituto de Física
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O IF - Instituto de Física, da Universidade Federal de Goiás, oferece Graduação em: Bacharelado em Física; Licenciatura em Física; Física Médica; e, Engenharia Física.
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Navegando IF - Instituto de Física por Autor "Adão Neto, Minos Martins"
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Item Phase transition in an 1D interacting dimers: an exact and simulational study(2022) Ferreira, Lucas de Souza; Jorge, Lucas Nunes; Adão Neto, Minos Martins; Caparica, Álvaro de AlmeidaIn this work we investigate the phase transition of interacting dimers. The results were obtained by the transfer matrix technique and by entropic simulations. The phase diagram of the system was elaborated showing the phase boundaries. From the proper definition of the order parameter, it is possible to obtain the critical exponents 1 ν ′ = 0.48680( 46) , γ ′ ν′ = 1.2522(37) and β ′ ν′ = 0.01726(43) and the critical temperature Tc = 0.06320(36), for the transition between the phase fulfilled with horizontal dimers and the empty lattice.Item Thermodynamic properties of interacting like-rod chains: entropic sampling simulations(2019) Ferreira, Lucas de Souza; Caparica, Álvaro de Almeida; Jorge, Lucas Nunes; Adão Neto, Minos MartinsIn this work we apply the transfer matrix method to obtain exact solutions for a rod-like interacting unidimensional system and carry out entropic simulations to obtain the same results. A joint density of states is adopted, such that it depends not only of the energy, but also of the total number of dimers and the number of interactions between interacting dimers. We estimate the density of dimers and vacancies, along with the number of interacting links per site, and compare with the exact results. The concordance is excellent.Item Thermodynamic properties of rod-like chains: entropic sampling simulations(2016) Ferreira, Lucas de Souza; Jorge, Lucas Nunes; Caparica, Álvaro de Almeida; Nascimento, D. A.; Adão Neto, Minos MartinsIn this work, we apply entropic sampling simulations to a three-state model which has exact solutions in the microcanonical and grand-canonical ensembles. We consider N chains placed on an unidimensional lattice, such that each site may assume one of the three states: empty (state 1), with a single molecule energetically null (state 2), and with a single molecule with energy ε (state 3). Each molecule, which we will treat here as dimers, consists of two monomers connected one to each other by a rod. The thermodynamic properties such as internal energy, densities of dimers and specific heat were obtained as functions of temperature, where the analytic results in the microcanonical and grand-canonical ensembles were successfully confirmed by the entropic sampling simulations.