10,161 research outputs found
Phase diagram of a 2D Ising model within a nonextensive approach
In this work we report Monte Carlo simulations of a 2D Ising model, in which
the statistics of the Metropolis algorithm is replaced by the nonextensive one.
We compute the magnetization and show that phase transitions are present for
. A phase diagram (critical temperature vs. the entropic
parameter ) is built and exhibits some interesting features, such as phases
which are governed by the value of the entropic index . It is shown that
such phases favors some energy levels of magnetization states. It is also
showed that the contribution of the Tsallis cutoff is essential to the
existence of phase transitions
Vortex solutions of the Lifshitz-Chern-Simons theory
We study vortex-like solutions to the Lifshitz-Chern-Simons theory. We find
that such solutions exists and have a logarithmically divergent energy, which
suggests that a Kostelitz-Thouless transition may occur, in which
voxtex-antivortex pairs are created above a critical temperature. Following a
suggestion made by Callan and Wilzcek for the global U(1) scalar field model,
we study vortex solutions of the Lifshitz-Chern-Simons model formulated on the
hyperbolic plane, finding that, as expected, the resulting configurations have
finite energy. For completeness, we also explore Lifshitz-Chern-Simons vortex
solutions on the sphere.Comment: Published version, added appendix on electromagnetic duality in
Lifshitz system
Harvey Whitehouse. 2004. Modes of Religiosity. A Cognitive Theory of Religious Transmission. Walnut Creek, Calif.: AltaMira Press. 191 pp.
Comentari sobre l’article “Parentesco y adopción. Adoptio imitatur naturam. ¿Nature vs. nurture?” de Jorge Grau Rebollo
Comentari de l'article: Parentesco y adopción. Adoptio imitatur naturam, ¿Nature vs. nurture? / Jorge Grau Rebollo. Quaderns-e, núm. 3, 200
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