Escuela de Fisica

May 30, 2024 | link.aps.org | Escuela de Fisica |Ciudad Universitaria |San Salvador |Erick Urquilla

In dense neutrino gases, the neutrino-neutrino coherent forward scattering gives rise to a complex flavor oscillation phenomenon not fully incorporated in simulations of neutron star mergers (NSM) and core collapse supernovae (CCSNe). Moreover, it has been proposed to be chaotic, potentially limiting our ability to predict neutrino flavor transformations in simulations.

Feb 14, 2024 | link.aps.org | Escuela de Fisica

In this paper, we study the impact of anisotropy on neutron stars with different equations of state, which have been modeled by a piecewise polytropic function with continuous sound speed. Anisotropic pressure in neutron stars is often attributed to interior magnetic fields, rotation, and the presence of exotic matter or condensates. We quantify the presence of anisotropy within the star by assuming a quasilocal relationship.

Dec 12, 2023 | raccefyn.co | Román Castañeda |Escuela de Fisica

Castañeda, R. (2023). Incertidumbre geométrica en interferencia no-paraxial. Revista De La Academia Colombiana De Ciencias Exactas, Físicas Y Naturales, 47(185), 795–806. https://doi.org/10.18257/raccefyn.1952 Los datos de descargas todavía no están disponibles.

Jul 25, 2023 | link.aps.org | Costa Rica |Escuela de Fisica

Abstract We consider a standard Ginzburg-Landau model of a ferroelectric whose electrical polarization is coupled to gradients of elastic strain. At the harmonic level, such flexoelectric interaction is known to hybridize acoustic and optic phonon modes and lead to phases with modulated lattice structures that precede the state with spontaneously broken inversion symmetry.