• Aggregation of magnetic microspheres : experiments and simulation 

      Helgesen, G.; Skjeltorp, A.T.; Mors, Paulo Machado; Botet, Robert; Jullien, Remi (1988) [Artigo de periódico]
      Uniformly sized microspheres interacting via long-range magnetic dipolar forces are used to study diffusion-limited cluster aggregation in a plane. The results show that it is possible to scale the temporal evolution of ...
    • Curvature-driven coarsening in the two-dimensional Potts model 

      Loureiro, Marcos Paulo de Oliveira; Arenzon, Jeferson Jacob; Cugliandolo, Leticia F.; Sicilia, Alberto (2010) [Artigo de periódico]
      We study the geometric properties of polymixtures after a sudden quench in temperature. We mimic these systems with the q-states Potts model on a square lattice with and without weak quenched disorder, and their evolution ...
    • Desordem e correlação quântica em duas dimensões 

      Malabarba, Artur de Souza Lima (2009) [Trabalho de conclusão de graduação]
      Resumo não disponível
    • A equação de Schrödinger não-linear com hopping a segundos vizinhos e desordem de Aubry-André 

      Flöther, Isabel Friedmann (2018) [Trabalho de conclusão de graduação]
      O estudo da evolução temporal de sistemas desordenados autointeragentes nos permite descobrir e descrever uma variedade de fenômenos interessantes de localização em condensados de Bose-Einstein. Neste trabalho, utilizamos ...
    • A equação de Schrödinger não linear discreta com desordem de Aubry-André e com campo elétrico DC 

      Junges, Leandro (2009) [Dissertação]
      Nesta dissertação é feito um estudo numérico da evolução temporal das soluções da equação de Schrödinger não linear unidimensional discreta, considerando os efeitos de um potencial aperiódico (ou desordenado) e a influência ...
    • Equation of state for hard-square lattice gases 

      Fernandes, Heitor Carpes Marques; Levin, Yan; Arenzon, Jeferson Jacob (2007) [Artigo de periódico]
      A simple equation of state is derived for a hard-core lattice gas of side length λ, and compared to the results of Monte Carlo simulations. In the disordered fluid phase, the equation is found to work very well for a ...
    • Experimental test of curvature-driven dynamics in the phase ordering of a two dimensional liquid crystal 

      Sicilia, Alberto; Arenzon, Jeferson Jacob; Dierking, Ingo; Bray, Alan J.; Cugliandolo, Leticia F.; Martínez Perdiguero, Josu; Alonso, Ibon; Pintre, Inmaculada C. (2008) [Artigo de periódico]
      We study electric field driven deracemization in an achiral liquid crystal through the formation and coarsening of chiral domains. It is proposed that deracemization in this system is a curvature-driven process. We test ...
    • Fate of topological states in incommensurate generalized Aubry-André models 

      Cestari, Jardel Caminha Carvalho; Foerster, Angela; Gusmao, Miguel Angelo Cavalheiro (2016) [Artigo de periódico]
      We study one-dimensional optical lattices described by generalized Aubry-André models that include both commensurate and incommensurate modulations of the hopping amplitude. This brings together two interesting features ...
    • Gás de rede com exclusão de vizinhos 

      Fernandes, Heitor Carpes Marques (2007) [Tese]
      Gases de Ijede, nos quais as partículas interagem exclusivamente via repulsão de caroço duro, têm sido utilizados como base para modelos dos mais variados sistemas desde fluidos I e magnetos atlé meios granulares e sistemas ...
    • Geometrical properties of the Potts model during the coarsening regime 

      Loureiro, Marcos Paulo de Oliveira; Arenzon, Jeferson Jacob; Cugliandolo, Leticia F. (2012) [Artigo de periódico]
      We study the dynamic evolution of geometric structures in a polydegenerate system represented by a q-state Potts model with nonconserved order parameter that is quenched from its disordered into its ordered phase. The ...
    • Liquid polymorphism, order-disorder transitions and anomalous behavior : a Monte Carlo study of the Bell-Lavis model for water 

      Fiore, Carlos Eduardo; Szortyka, Marcia Martins; Barbosa, Marcia Cristina Bernardes; Henriques, Vera Bohomoletz (2009) [Artigo de periódico]
      The Bell–Lavis model for liquid water is investigated through numerical simulations. The lattice-gas model on a triangular lattice presents orientational states and is known to present a highly bonded low density phase and ...
    • Localização de Anderson em condensados de Bose-Einstein 

      Cestari, Jardel Caminha Carvalho (2011) [Dissertação]
      Investigamos a transição de localização induzida por desordem em condensados de Bose- Einstein em redes unidimensionais, no limite não interagente, utilizando os modelos de Anderson e de Aubry-Andr´e para a desordem. Através ...
    • Microemulsion model with oil-water anisotropy 

      Barbosa, Marcia Cristina Bernardes; Frichembruder, Marcos (1996) [Artigo de periódico]
      We consider a spin model for applications to oil-water-amphiphilic-surfactant mixtures near the region where those phases coexist. We analyze this model assuming that oil and water molecules cannot be treated symmetrically, ...
    • Monte Carlo simulations of two-dimensional hard core lattice gases 

      Fernandes, Heitor Carpes Marques; Arenzon, Jeferson Jacob; Levin, Yan (2007) [Artigo de periódico]
      Monte Carlo simulations are used to study lattice gases of particles with extended hard cores on a two-dimensional square lattice. Exclusions of one and up to five nearest neighbors (NN) are considered. These can be mapped ...
    • Optimally adapted multistate neural networks trained with noise 

      Erichsen Junior, Rubem; Theumann, Walter Karl (1999) [Artigo de periódico]
      The principle of adaptation in a noisy retrieval environment is extended here to a diluted attractor neural network of Q-state neurons trained with noisy data. The network is adapted to an appropriate noisy training overlap ...
    • Transformações de ordem-desordem no sistema ixiolita-columbita-wodginita 

      Antonietti, Volmir (2000) [Dissertação]
      O mineral columbita-tantalita (muitas vezes chamado simplesmente columbita,para Nb>Ta,ou tantalita,paraNb<Ta) é uma solução sólida do tipo AB206 (A=Fe,Co,Mn,Mg, Ni e B=Ta, Nb), pertencente ao grupo espacial Pbcn ...