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pro vyhledávání: '"Ruiz, F. Ruiz"'
Autor:
Ruiz, F. Ruiz
Publikováno v:
Eur. Phys. J. C 76, 94 (2016)
Perturbative quantization of Yang-Mills theory with a gauge algebra given by the classical double of a semisimple Lie algebra is considered. The classical double of a real Lie algebra is a nonsemisimple real Lie algebra that admits a nonpositive defi
Externí odkaz:
http://arxiv.org/abs/1512.02191
Autor:
Ruiz, F. Ruiz
Publikováno v:
Eur. Phys. J. C 75,317 (2015)
Yang-Mills theory with a symmetry algebra that is the semidirect product $\mathfrak{h}\ltimes\mathfrak{h}^*$ defined by the coadjoint action of a Lie algebra $\mathfrak{h}$ on its dual $\mathfrak{h}^*$ is studied. The gauge group is the semidirect pr
Externí odkaz:
http://arxiv.org/abs/1408.1049
Publikováno v:
JHEP 1108:047,2011
Lorentzian signature D-branes of all dimensions for the Nappi-Witten string are constructed. This is done by rewriting the gluing condition $J_+=FJ_-$ for the model chiral currents on the brane as a well posed first order differential problem and by
Externí odkaz:
http://arxiv.org/abs/1104.4730
Autor:
Horcajada, G., Ruiz, F. Ruiz
Publikováno v:
JHEP 1109:020,2011
The geometric description of D-branes in WZW models is pushed forward. Our starting point is a gluing condition\, $J_{+}=FJ_-$ that matches the model's chiral currents at the worldsheet boundary through a linear map $F$ acting on the WZW Lie algebra.
Externí odkaz:
http://arxiv.org/abs/1104.4722
Autor:
Marculescu, S., Ruiz, F. Ruiz
Publikováno v:
Phys.Rev.D79:025004,2009
A family of diffeomorphism-invariant Seiberg--Witten deformations of gravity is constructed. In a first step Seiberg--Witten maps for an SO(1,3) gauge symmetry are obtained for constant deformation parameters. This includes maps for the vierbein, the
Externí odkaz:
http://arxiv.org/abs/0808.2066
Autor:
Horcajada, G., Ruiz, F. Ruiz
Publikováno v:
Nucl.Phys.B799:110-135,2008
The open string on the plane-wave limit of $dS_n\times S^n $ with constant $B_2$ and dilaton background fields is canonically quantized. This entails solving the classical equations of motion for the string, computing the symplectic form, and definin
Externí odkaz:
http://arxiv.org/abs/0711.2991
Autor:
Marculescu, S., Ruiz, F. Ruiz
Publikováno v:
Phys.Rev.D74:105004,2006
The field equations coupling a Seiberg-Witten electromagnetic field to noncommutative gravity, as described by a formal power series in the noncommutativity parameters $\theta^{\alpha\beta}$, is investigated. A large family of solutions, up to order
Externí odkaz:
http://arxiv.org/abs/hep-th/0607201
Publikováno v:
Phys.Rev.D74:025014,2006; Erratum-ibid.D74:029901,2006
We prove that the Moyal product is covariant under linear affine spacetime transformations. From the covariance law, by introducing an $(x,\Theta)$-space where the spacetime coordinates and the noncommutativity matrix components are on the same footi
Externí odkaz:
http://arxiv.org/abs/hep-th/0604206
Publikováno v:
Nucl.Phys.B727:513-536,2005
We look in Euclidean $R^4$ for associative star products realizing the commutation relation $[x^\mu,x^\nu]=i\Theta^{\mu\nu}(x)$, where the noncommutativity parameters $\Theta^{\mu\nu}$ depend on the position coordinates $x$. We do this by adopting Ri
Externí odkaz:
http://arxiv.org/abs/hep-th/0504022
Publikováno v:
Phys.Lett.B610:141-146,2005
It is argued that the one-loop effective action for a space-like noncommutative scalar field theory does not exist. This indicates that such theories are not renormalizable already at one loop order and suggests supersymmetrization and reinvestigatin
Externí odkaz:
http://arxiv.org/abs/hep-th/0412235