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Recolector de Ciencia Abierta, RECOLECTA
Bachelor thesis . 2020
License: CC BY NC ND
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Recolector de Ciencia Abierta, RECOLECTA
Bachelor thesis . 2020
License: CC BY NC ND
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
UCrea
Bachelor thesis . 2020
License: CC BY NC ND
Data sources: UCrea
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Gravedad de Einstein-Cartan y Cosmología

Einstein-Cartan gravity and Cosmology
Authors: Rivera López-Brea, Diego;

Gravedad de Einstein-Cartan y Cosmología

Abstract

RESUMEN: Se ha realizado una generalización de la Relatividad General, en la cual se levanta la restricción de nulidad sobre la torsión. Esto resulta en la introducción de una segunda ecuación de campo que, en analogía con la ecuación de campo obtenida en Relatividad General, liga un objeto geométrico con otro físico. Si en Relatividad General se tenía curvatura y energía-momento, ahora se le añade una segunda ecuación que liga torsión con espín. Esto se hace desde las coordenadas de la variedad y desde el espacio tangente, donde recibe el nombre de teleparalelismo. Una vez obtenidas las ecuaciones de campo, se calcula un nuevo tensor de Einstein que tenga en cuenta que la conexión ya no es simétrica, y utilizando la nueva ecuación de campo se expresa el mismo en función del espín. A partir de aquí, resolver dentro del marco cosmológico teniendo en cuenta el nuevo tensor de Einstein. La contribución de la torsión servirá para explicar dos problemas cosmológicos tradicionales, la planitud y el horizonte, sin necesidad de teorías inacionarias.

ABSTRACT: A generalization of General Relativity has been made, in which the nullity restriction on torsion is lifted. This results in the introduction of a second field equation that, in analogy with the field equation obtained in General Relativity, links a geometric object with a physical one. If in General Relativity curvature and energy-momentum were linked by a field equation, now a second equation is added that links torsion with spin. This is done from the coordinates of the manifold and from the tangent space, where the theory is known as teleparallelism. Once the field equations are obtained, a new Einstein tensor is calculated that takes into account that the connection is no longer symmetric, and using the new field equation it is expressed as a function of spin. From here, solve within the cosmological framework taking into account the new Einstein tensor. The contribution of torsion will serve to explain two traditional cosmological problems, atness and horizon, without the need for inationary theories.

Grado en Física

Country
Spain
Related Organizations
Keywords

General Relativity, Relatividad General, Gravedad, Cosmología, Gravity, Teleparalelism, Teleparalelismo, Einstein-Cartan, Cosmology

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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