Thesis (Ph.D.)--University of Adelaide, Dept. of Physics and Mathematical Physics, 2003. / Bibliography: leaves 181-190.

Thesis (Ph. D.)--University of Texas at Austin, 2004. / Supervisor: Jacques Distler. Vita. Includes bibliographical references. Also available from UMI.

Thesis (M.Sc.). / Written for the Dept. of Physics. Title from title page of PDF (viewed 2009/08/07). Includes bibliographical references.

Thesis (M.Sc.). / Written for the Dept. of Physics. Title from title page of PDF (viewed 2009/09/07). Includes bibliographical references.

Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 75-81). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph. D.)--Rutgers University, 2008. / "Graduate Program in Physics and Astronomy." Includes bibliographical references (p. 86-92).

Made available in DSpace on 2015-06-17T19:33:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-08-07. Added 1 bitstream(s) on 2015-06-18T12:48:13Z : No. of bitstreams: 1 000826754.pdf: 1966505 bytes, checksum: 8923fad36f756ab17c9bb0de6d0871a9 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Esta tese é baseada em parte do meu trabalho de doutoramento e tem como objetivo apresentar uma análise detalhada de algumas propriedades recém abordadas do fantasma b composto no formalismo de espinores puros. Primeiramente será feita uma revisão dos formalismos mínimo e não-mínimo. Em seguida, será apresentada a construção do fantasma b passo a passo, inlcuindo correções quânticas. Por fim, serão estudadas em detalhes suas propriedades fundamentais, ue vão desde a nilpotência até a definição de um possível conjugado, o fantasma c / This thesis is based in part of my work during the Ph.D. and aims to present a detailed analysis of some newly studied properties of the composite non-minimal pure spinor b ghost. First, a review of the minimal and non-minimal pure spinor formalisms will be presented. Then, the construction of the non-minimal b ghost will be done step-by-step, including quantum corrections. Finally, some of its fundamental properties will be studied i detail, ranging from nilpotency until the definition of a possible canonical conjugate, the c ghost / FAPESP: 2009/17516-4

No description available.

Motivated by the Klebanov-Polyakov conjecture we investigate the O(N) vector model at large N on a squashed three-sphere and its holographic relation to bulk gravity on asymptotically locally AdS4 space. We present analytical results for the action of the field theory as the squashing parameter , alpha→ -1, when the boundary becomes effectively one dimensional. In this limit we solve the theory exactly and show that the action of the boundary theory scales as ln(1 + alpha)/(1 + alpha)[2] which is to be compared and contrasted with the -1/(1 + alpha)[2] scaling of gravity in AdS-Taub-NUT space. These results are consistent with the numerical evidence presented in hep- th/0503238, and the soft logarithmic departure is interpreted as a prediction for the contribution due to higher spin fields in the bulk AdS[4] geometry. We then give an introduction to non relativistic AdS/CFT and numerically compute the inter quark potential in the non relativistic theory obtained by taking the DLCQ of N = 4 SYM theory by considering Wilson loops in the dual string theory via the AdS/CFT correspondence.

Orientador: Nathan Jacob Berkovits / Banca: Victor de Oliveira Rivelles / Banca: Galen Mihaylov Sotkov / Resumo: Será feita uma revisão acerca das simetrias da teoria de corda bosônica e suas anomalias. Este estudo será feito tanto para o caso de cordas movendo-se num espaço-tempo tipo Minkowski, como no caso de cordas acopladas a campos tomando valores no espaço-tempo. Usando teoria de perturbações, será calculada a condição de cancelamento de anomalia a 1-loop. Esta condição estabelecerá vinculos interessantes entre os campos do espaço tempo através de uma equação do tipo da equação de Einstein. Finalmente, será mostrado como calcular condições de cancelamento de anomalia a ordens mais altas em teoria de perturbações usando métodos do grupo de renormalização / Abstract: A review will be made of the symmetries and the anomalies of the bosonic string. It will be considered the case of a string moving in a Minkowskian space- time and also, a string coupled to fields in space-time. Perturbation theory will allow calculation at the one-loop levei of the condition under which the anomaly vanishes. This condition will establish interesting constraints on the background fields since they obey an equation of the Einstein type. Finally, it will be shown how to calculate conditions for anomaly vanishing beyond the one-loop order using renormalization group methods / Mestre