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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Descrição de Horava-Lifshitz para modelos que violam a invariância de Lorentz via operadores de altas ordens derivativas.

FARIAS, Klecio Emanuel Lima de. 17 October 2018 (has links)
Submitted by Emanuel Varela Cardoso (emanuel.varela@ufcg.edu.br) on 2018-10-17T19:12:16Z No. of bitstreams: 1 KLECIO EMANUEL LIMA DE FARIAS – DISSERTAÇÃO (PPGFísica) 2017.pdf: 669446 bytes, checksum: 26edbf33fb48c30aed37e5d2c6da2a80 (MD5) / Made available in DSpace on 2018-10-17T19:12:16Z (GMT). No. of bitstreams: 1 KLECIO EMANUEL LIMA DE FARIAS – DISSERTAÇÃO (PPGFísica) 2017.pdf: 669446 bytes, checksum: 26edbf33fb48c30aed37e5d2c6da2a80 (MD5) Previous issue date: 2017-10-04 / Capes / Neste trabalho, aplicamos o reescalonamento tipo ao de Hoˇrava-Lifshitz para reescrever algumas teorias eletrodinâmicas de altas ordens derivativas que violam a simetria de Lorentz, controladas por quadrivetores: (n )s que determinam direções preferenciais no espaço - tempo. As equações de movimento foram obtidas, através das quais analisamos as relações de dispersão modificadas em conjunto com os resultados observacionais das experiências de explosão de raios gama (GRB). Os limites do expoente crítico foram discutidos a partir dos dados dos GRBs através de cálculos de grau de polarizaçao (usando operador de dimensão-cinco) e de atraso temporal (usando operador de dimensão-seis) nas propagações dos fótons. As implicações físicas foram comparadas com recentes resultados da literatura sobre limites da quebra da invariância de Lorentz via GRBs. / In this work, we used a Hoˇrava-Lifshitz scaling to rewrite a high-order derivative electrodynamics that violates the Lorentz symmetry, controlled by 4-vector (n )s which determine the space-time preferential directions. The equations of motion were obtained, through which the modified dispersion relation was analyzed together with observational results of gamma ray bursts (GRB). The limits of the critical exponent were discussed from the GRBs values through calculation of degree of polarization (using five-dimensional operator) and temporal delay (using six-dimensional operator) on photon propagation. The physical implications were compared with the current results from the literature regarding Lorentz invariance violation via GRB.

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