Browsing IMEF - Artigos publicados em periódicos by Author "Salvador, Juan Segundo Valverde"

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  • Sifuentes, Rodolfo Alvan Casana; Fainberg, Vladimir Yakovlevich; Escobar, Bruto Max Pimentel; Salvador, Juan Segundo Valverde (2003)
    The thermodynamical partition function of the Duffin–Kemmer–Petiau theory is evaluated using the imaginary-time formalism of quantum field theory at finite temperature and path integral methods. The DKP partition function ...
  • Lunardi, José Tadeu Teles; Manzoni, Luiz Alberto; Escobar, Bruto Max Pimentel; Salvador, Juan Segundo Valverde (2002)
    In this paper we consider the scalar sector of Duffin-Kemmer-Petiau theory in the framework of Epstein-Glaser causal method. We calculate the lowest order distributions for Compton scattering, vacuum polarization, self-energy ...
  • Sifuentes, Rodolfo Alvan Casana; Escobar, Bruto Max Pimentel; Salvador, Juan Segundo Valverde (2006)
    In this work we study the electromagnetic field at finite temperature via the massless DKP formalism. The constraint analysis is performed and the partition function for the theory is constructed and computed. When it is ...
  • Fainberg, Vladimir Yakovlevich; Escobar, Bruto Max Pimentel; Salvador, Juan Segundo Valverde (2004)
    We prove the equivalence of many-photon Green functions in statistical quantum field Duffin-Kemmer-Petiau (DKP) and Klein-Gordon- Fock (KGF) theories using functional path integral formalism for partition functional in ...
  • Santos, Onofre Rojas; Salvador, Juan Segundo Valverde; Souza, Sergio Martins de (2009)
    The paper discusses the transformation of decorated Ising models into an effective undecorated spin model, using the most general Hamiltonian for interacting Ising models including a long range and high order interactions. ...
  • Salvador, Juan Segundo Valverde; Santos, Onofre Rojas; Souza, Sergio Martins de (2008)
    Geometrically frustrated spin models with competing interaction parameters and the phase diagram of their corresponding T = 0 ground state energies are studied. The partition function defined by means of the transfer ...
  • Salvador, Juan Segundo Valverde; Santos, Onofre Rojas; Souza, Sergio Martins de (2008)
    The asymmetric tetrahedron is composed of all edges of a tetrahedron represented by Ising interactions except for one, which has a Heisenberg-type interaction. This asymmetric tetrahedron is arranged by connecting a vertex ...
  • Sifuentes, Rodolfo Alvan Casana; Pazetti, Márcio; Escobar, Bruto Max Pimentel; Salvador, Juan Segundo Valverde (2009)
    We give an action for the massless spinning particle in pseudoclassical mechanics by using grassmann variables. The constructed action is invariant under _-reparametrizations, local SUSY and O(N) transformations. After ...
  • Lunardi, José Tadeu Teles; Escobar, Bruto Max Pimentel; Teixeira, Randall Guedes; Salvador, Juan Segundo Valverde (2000)
    Two problems relative to the electromagnetic coupling of Duffin-Kemmer-Petiau (DKP) theory are discussed: the presence of an anomalous term in the Hamiltonian form of the theory and the apparent difference between the ...

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