165 citations · 493 across the 13 of their papers we have counts for
11 papers · 1 filter
Symmetry breaking in nonuniform noncommutative theory at finite temperature
J. M. Hernández, C. Ramírez, M. Sánchez
We consider the 2PI Cornwall-Jackiw-Tomboulis effective action at finite temperature for a noncommutative real scalar field theory in 4 dimensions, with noncommutativity among spac…
Supergroup BF action for supergravity
C. Ramirez, E. Rosales
General relativity can be formulated as a SU(2) BF-theory with constraints, as has been shown, by Plebański. The cosmological constant term can be obtained from the constraint term…
Twisted Covariant Noncommutative Self-dual Gravity
S. Estrada-Jimenez, H. Garcia-Compean, O. Obregon +1
A twisted covariant formulation of noncommutative self-dual gravity is presented. The formulation for constructing twisted noncommutative Yang-Mills theories is used. It is shown t…
Towards Noncommutative Quantum Black Holes
J. C. Lopez-Dominguez, O. Obregon, C. Ramirez +1
In this paper we study noncommutative black holes. We use a diffeomorphism between the Schwarzschild black hole and the Kantowski-Sachs cosmological model, which is generalized to…
Noncommutative Quantum Cosmology
H. Garcia-Compean, O. Obregon, C. Ramirez
We propose a model for noncommutative quantum cosmology by means of a deformation of minisuperspace. For the Kantowski-Sachs metric we are able to find the exact wave function. We…
A Vector Non-abelian Chern-Simons Duality
H. Garcia-Compean, O. Obregon, C. Ramirez
Abelian Chern-Simons gauge theory is known to possess a `-self-dual' action where its coupling constant is inverted {\it i.e.} . Here a vector…
On S-duality in (2+1)-Chern-Simons Supergravity
H. Garcia-Compean, O. Obregon, C. Ramirez +1
Strong/weak coupling duality in Chern-Simons supergravity is studied. It is argued that this duality can be regarded as an example of superduality. The use of supergroup techniques…
Pursuing Gravitational S-Duality
H. Garcia-Compean, O. Obregon, C. Ramirez
Recently a strong-weak coupling duality in non-abelian non-supersymmetric theories in four dimensions has been found. An analogous procedure is reviewed, which allows to find the `…
Gravitational Duality in MacDowell-Mansouri Gauge Theory
H. Garcia-Compean, O. Obregon, C. Ramirez
Strong-weak duality invariance can only be defined for particular sectors of supersymmetric Yang-Mills theories. Nevertheless, for full non-Abelian non-supersymmetric theories, dua…
Towards a Gravitational Analog to S-duality in Non-abelian Gauge Theories
H. Garcia-Compean, O. Obregon, J. F. Plebanski +1
For non-abelian non-supersymmetric gauge theories, generic dual theories have been constructed. In these theories the couplings appear inverted. However, they do not possess a Yang…
Hamiltonian Approach to Supergravity
J. Gamboa, C. Ramirez
We study supergravity in a covariant and gauge independent way. The theory is obtained from bosonic gravity following the square root method and the diffeomorphism supera…