165 citations · 493 across the 13 of their papers we have counts for
13 papers
Ground states for nonuniform periodic Ising chains
J. P. Martínez-Garcilazo, C. Ramírez
We give a generalization of Morita's works on ground states of Ising chains, for chains with a periodic structure with different spins, and distant neighbor interactions. The main…
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…
On the sensitivity of the HAWC observatory to gamma-ray bursts
HAWC collaboration, A. U. Abeysekara, J. A. Aguilar +145
We present the sensitivity of HAWC to Gamma Ray Bursts (GRBs). HAWC is a very high-energy gamma-ray observatory currently under construction in Mexico at an altitude of 4100 m. It…
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…