Ciencias,UNAM

Browsing by Author "López-Pena, R"

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Browsing by Author "López-Pena, R"

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  • Phase transitions and accidental degeneracy in nonlinear spin systems
    Castanos, O; Hirsch, JG; López-Pena, R; López-Moreno, E (2005)
    A characterization of phase transitions and related accidental degeneracies is presented for a general spin Hamiltonian containing linear and quadratic terms. The existence of first-, second-, and third-order phase transitions ...
  • Shape phase transitions in algebraic nuclear models
    Castanos, O; López-Moreno, E; López-Pena, R (2003)
    A review of the shape phase transitions within the IBA, is presented. This nuclear model depends on two control parameters, (r(2), r(1)), and two order parameters, (beta, gamma). In the control parameter space, the accesible ...