Chern Simons
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. An improved gauge unfixing formalism and the abelian pure chern simons theory
We propose a new scheme of embedding constrained systems based on the Gauge Unfixing formalism. Our aim is to modify directly the original phase space variables of a system in order to be gauge invariant quantities. We apply our procedure in a nontrivial constrained model that is the Abelian Pure Chern Simons Theory where new results are obtained. Among them
Brazilian Journal of Physics. Publicado em: 2007-09
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14. Monopolos tipo-Dirac em uma eletrodinâmica com violação das simetrias de Lorentz e CPT / On Dirac-like monopoles in a Lorentz and CPT-violating electrodynamics
Nesta dissertação estudamos monopolos magnéticos numa estrutura de uma Eletrodinâmica que violam as simetrias de Lorentz e CPT, em (3+1)D. Este é o modelo de Maxwell estendido por um termo do tipo Chern-Simons, bμ.FμνAv, que respeita a transformação de calibre mas viola as simetrias de Lorentz e CPT (como conseqüência, a dualidade é
Publicado em: 2007
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15. Physical variables of d = 3 Maxwell-Chern-Simons theory by symplectic projector method
The Symplectic Projector Method is applied to derive the local physical degrees of freedom and the physical Hamiltonian of the Maxwell-Chern-Simons theory in d = 1+2. The results agree with the ones obtained in the literature through different approaches.
Brazilian Journal of Physics. Publicado em: 2006-12
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16. Remarks on Lorentz and CPT violation in field theory
In this brief review we explicitly calculate the radiative corrections to the Chern-Simons-like term in the cases of zero and finite temperature, and in the gravity theory. Our results are obtained under the general guidance of dimensional regularization.
Brazilian Journal of Physics. Publicado em: 2006-12
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17. Removing the Wess Zumino fields in the BFFT formalism
In this paper we give a method that removes the Wess Zumino fields of the BFFT formalism. Consequently, we derive a gauge invariant system written only in terms of the original second class phase space variables where important physical properties can be raised. Here, the Wess Zumino fields are considered only as auxiliary variables that permit us to reveal
Brazilian Journal of Physics. Publicado em: 2006-03
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18. ESTUDO DO POTENCIAL DE INTERAÇÃO ELÉTRON-ELÉTRON NO CONTEXTO DA TEORIA DE MAXWELL-CHERN-SIMONSPROCA COM VIOLAÇÃO DE LORENTZ / STUDY OF POTENTIAL OF INTERACTION ELECTRON-ELECTRON IN THE CONTEXT OF THE THEORY OF MAXWELL - CHERN - SIMONSPROCA WITH BREACH OF LORENTZ
This work is initiated with the presentation of an overview on the main theoretical models of planar electrodynamics (QED3), which are studied for their classical solutions. This is done by obtaining the equations of wave, which provide their solutions to the fields and potential. As a result, makes up the youngest of the potential for interaction and ᗹ
Publicado em: 2006
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19. VÃrtices NÃo-Abelianos com Acoplamento NÃo-MÃnimo em um Background Gravitacional
The main purpose of this thesis is to investigate how the non-Abelian gauge symmetry affects the solutions of the equations of motion in some field theory models. We concern ourselves specifically with three dimensional field theories. We will note here that planar systems give us the needed informations about the theories approached here. Topological defect
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2005
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20. CONSISTENCY IN THREEDIMENSIONAL PERTURBATIVE CALCULATION ON QUANTUM FIELD THEORY: THE QUANTUM ELETRODYNAMICS / CONSISTÊNCIA NO CÁLCULO PERTURBATIVO TRIDIMENSIONAL EM TEORIA QUÂNTICA DE CAMPOS: A ELETRODINÂMICA QUÂNTICA
In this work we present a detailed study about the three-dimensional quantum electro- dynamics QED3, in perturbative solution at the one loop level. A very general method, concerning the manipulations and calculations involving divergent Feynman integrals, alternative to the traditional regularization techniques, is adopted. The basic physical processes are
Publicado em: 2005
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21. Transporte quântico em poços parabólicos largos / Transportation wide parabolic quantum wells
The gradual progress, or evolution, of the two-dimensional (2D) toward three-dimensional (3D) Landau states was studied in wide parabolic quantum Wells (W = 1000 6000 Å). As transport technique, we used measurements of the magnetoresistence in intense (B = 0 15 T) and tilted ( = 0 90°; perpendicular parallel) magnetic Field at low temperature (T = 50 Mk).
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2003
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22. Non Relativistic Limit in QFT: a Wilson Renormalization Group Approach in the Minkowski Space
We study the non relativistic limit of a model of fermions interacting through a Chern-Simons field, from a perspective that resembles the Wilson Renormalization Group (WRG) approach. The main difference of our approach to WRG is that instead of working in the Euclidean space, we directly work in Minkowski space. For the nonrelativistic limit this procedure
Brazilian Journal of Physics. Publicado em: 2001-06
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23. Remarks on Topological Models and Fractional Statistics
One of the most intriguing aspects of Chern-Simons-type topological models is the fractional statistics of point particles which has been shown essential for our understanding of the fractional quantum Hall effects. Furthermore these ideas are applied to the study of high Tc superconductivity. We present here an recently proposed model for fractional spin wi
Brazilian Journal of Physics. Publicado em: 2001-06
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24. Chern-Simons Gravity: from 2+1 to 2n+1 dimensions
These lectures provide an elementary introduction to Chern Simons Gravity and Supergravity in d = 2n + 1 dimensions.
Brazilian Journal of Physics. Publicado em: 2000-06