Space-weather disturbances can disrupt radio communications, navigation, defense, spacecraft operations and modern critical technological systems, making reliable characterization of the near-Earth response to solar activity important. Distributed magnetometer networks continuously monitor this environment, but heterogeneous data quality, local observing conditions, and station-by-station...
We present an analytical method for determining the quarter-half-quarter (QHQ) wave-plate settings required to implement a prescribed $\mathrm{U}(2)$ polarization transformation, up to a physically irrelevant global phase. The method addresses the inverse problem in which the desired operation is specified as a unitary matrix rather than by Euler angles or optical-element orientations. By...
Se investiga la resolución de la anomalía inercial de la masa en la teoría clásica de campos. Tomando como antecedente la discrepancia histórica en la masa electromagnética —resuelta por Frenkel mediante una formulación de segundo orden en la densidad lagrangiana en el límite de carga puntual—, este trabajo analiza la extrapolación del enfoque al campo escalar real. En primer lugar, se...
Parallel plates immersed into a system have helped to understand fundamental concepts in Physics, such as the Casimir effect and the Fabry-Perot interferometer. Motivated by these phenomena, we consider films with a SISIS structure, where S and I represent superconducting and insulating layers, respectively. We find a novel kind of resonance promoted by the normal layers that play the role of...
We study the Euclidean action and Brown–York quasilocal mass of the Melvin and Schwarzschild–
Melvin geometries in four-dimensional Einstein–Maxwell theory. Since these spacetimes do not
exhibit the usual spherically asymptotically flat behavior, we introduce a cylindrical regularization
scheme adapted to the magnetic axis. The boundary is placed at a fixed cylindrical radius, while
the...
Usando la tabla de masas AME 2020, se calcula la energía disponible de las reacciones de la fisión inducida por neutrones térmicos de los núcleos físiles 233U, 235U y 239Pu, respectivamente. Con valores experimentales obtenidos por otros autores, calculamos los máximos de energía cinética total de las parejas de fragmentos complementarios. Con esos valores se calcula la energía de excitación...
Non-unitary evolution described by the Lindblad formalism offers a powerful pathway to search for physics beyond the Standard Model in neutrino propagation. This contribution explores energy-dependent quantum decoherence in the $\nu_\mu \rightarrow \nu_\mu$ disappearance channel, using public reconstructed spectra from the NO$\nu$A experiment at an 810 km baseline. We investigate how...
