Browsing by Author "Munoz, Enrique"

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    Fermion self-energy and effective mass in a noisy magnetic background
    (2024) Castano-Yepes, Jorge David; Munoz, Enrique
    In this article, we consider the propagation of QED fermions in the presence of a classical background magnetic field with white-noise stochastic fluctuations. The effects of the magnetic field fluctuations are incorporated into the fermion and photon propagators in a quasiparticle picture, which we developed in previous works using the replica trick. By working in the very strong-field limit, here we explicitly calculate the fermion self-energy involving radiative contributions at first order in alpha(em), in order to obtain the noise-averaged mass of the fermion propagating in the fluctuating magnetized medium. Our analytical results reveal a leading double-logarithmic contribution similar to[ln vertical bar eB vertical bar =m(2))](2) to the mass, with an imaginary part representing a spectral broadening proportional to the magnetic noise autocorrelation Delta. While a uniform magnetic field already breaks Lorentz invariance, inducing the usual separation into two orthogonal subspaces (perpendicular and parallel with respect to the field), the presence of magnetic noise further breaks the remaining symmetry, thus leading to distinct spectral widths associated with fermion and antifermion, and their spin projection in the quasiparticle picture.
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    Let's defend Dichato! Common goods and territorial conflict in Chilean coastal areas
    (PONTIFICA UNIV CATOLICA CHILE, INST GEOGRAFIA, 2017) Camus, Pablo; Hidalgo, Rodrigo; Perez, Leonel; Munoz, Enrique
    The Civil Code of the Republic of Chile established that fishermen could make use of the sea beaches for their fishing activities, thereby defining a coastline space of independent common use for the neighboring owners, who would soon become a territory of conflict that would increase to the extent that different economic activities were superimposed on these common spaces. This paper presents some historical examples that reflect how fishermen used this right to defend their interests. Special atention is given to the case of the coastal edge of Dichato, shortly before it were the scene of a conflict involving the State, owners, fishermen and vacationers in the mid-twentieth century.
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    The stepwise path integral of the relativistic point particle
    (2018) Koch, Benjamin; Munoz, Enrique
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    Thermoelectric Efficiency of a Topological Nano-Junction
    (2018) Alamo, Manuel; Munoz, Enrique