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- Universidad Nacional Autónoma de MéxicoMX165 papers
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38 papers · 1 filter
Spontaneous parametric down conversion in chirped, aperiodically-poled crystals
X. Sanchez-Lozano, Jose Luis Lucio
We present a theoretical analysis of the process of spontaneous parametric down conversion (SPDC) in a non-linear crystal characterized by a linearly-chirped X(2) grating along the…
The Magnetic Fields at the Surface of Active Single G-K Giants
M. Aurière, R. Konstantinova-Antova, C. Charbonnel +15
We investigate the magnetic field at the surface of 48 red giants selected as promising for detection of Stokes V Zeeman signatures in their spectral lines. We use the spectropolar…
Type IIB flux vacua from G-theory II
Philip Candelas, Andrei Constantin, Cesar Damian +2
We find analytic solutions of type IIB supergravity on geometries that locally take the form with a generalised complex manifold. The…
Type IIB flux vacua from G-theory I
Philip Candelas, Andrei Constantin, Cesar Damian +2
We construct non-perturbatively exact four-dimensional Minkowski vacua of type IIB string theory with non-trivial fluxes. These solutions are found by gluing together, consistently…
On a symmetry relating gravity with antigravity
Israel Quiros
I investigate the impact of a "would be" fundamental symmetry of the laws of nature under the interchange of gravity and antigravity, on the understanding of negative energies in g…
Effective diffusion on riemannian fiber bundles
Carlos Valero Valdes
The purpose of this paper is to provide equations to model the evolution of effective diffusion over a Riemannian fiber bundle (under the hypothesis of infinite diffusion rate alon…