58 citations · 436 across the 21 of their papers we have counts for
22 papers
Resonant JPZ algebras and 3D Chern--Simons gravity
Remigiusz Durka, Nelson Merino, D. M. Peñafiel
In this work we construct three-dimensional Chern--Simons gravity theories for the six resonant algebras generated by the Lorentz generators , translations , and an…
Conformal renormalization of scalar-tensor theories
Giorgos Anastasiou, Ignacio J. Araya, Mairym Busnego-Barrientos +2
We study a conformally coupled scalar-tensor theory with a quartic potential possessing local conformal symmetry up to a boundary term. We show that requiring the restoration of th…
Thin shell dynamics in Lovelock gravity
Pablo Guilleminot, Nelson Merino, Rodrigo Olea
We study matching conditions for a spherically symmetric thin shell in Lovelock gravity which can be read off from the variation of the corresponding first-order action. In point o…
Most general theory of 3d gravity: Covariant phase space, dual diffeomorphisms, and more
Marc Geiller, Christophe Goeller, Nelson Merino
We show that the phase space of three-dimensional gravity contains two layers of dualities: between diffeomorphisms and a notion of "dual diffeomorphisms" on the one hand, and betw…
First-order Lagrangian and Hamiltonian of Lovelock gravity
Pablo Guilleminot, Félix-Louis Julié, Nelson Merino +1
Based on the insight gained by many authors over the years on the structure of the Einstein-Hilbert, Gauss-Bonnet and Lovelock gravity Lagrangians, we show how to derive -- in an e…
Mimetic Einstein-Cartan-Kibble-Sciama (ECKS) gravity
F. Izaurieta, P. Medina, N. Merino +2
In this paper, we formulate the Mimetic theory of gravity in first-order formalism for differential forms, i.e., the mimetic version of Einstein-Cartan-Kibble-Sciama (ECKS) gravity…
Semi-simple enlargement of the algebra from a Chern-Simons theory
Patrick Concha, Nelson Merino, Evelyn Rodríguez +2
In this work we present a BMS-like ansatz for a Chern-Simons theory based on the semi-simple enlargement of the Poincaré symmetry, also known as AdS-Lorentz algebra. We start by sh…
Asymptotic symmetries of three-dimensional Chern-Simons gravity for the Maxwell algebra
Patrick Concha, Nelson Merino, Olivera Miskovic +3
We study a three-dimensional Chern-Simons gravity theory based on the Maxwell algebra. We find that the boundary dynamics is described by an enlargement and deformation of the $\ma…
Chern-Weil theorem, Lovelock Lagrangians in critical dimensions and boundary terms in gravity actions
Nathalie Deruelle, Nelson Merino, Rodrigo Olea
In this paper we show how to translate into tensorial language the Chern-Weil theorem for the Lorentz symmetry, which equates the difference of the Euler densities of two manifolds…
On the algorithm to find S-related Lie algebras
Carlos Inostroza, Igor Kondrashuk, Nelson Merino +1
In this article we describe the Java library that we have recently constructed to automatize the S-expansion method, a powerful mathematical technique allowing to relate different…
On a Java library to perform S-expansions of Lie algebras
Carlos Inostroza, Igor Kondrashuk, Nelson Merino +1
The S-expansion method is a generalization of the Inönü-Wigner (IW) contraction that allows to study new non-trivial relations between different Lie algebras. Basically, this metho…
Einstein-Gauss-Bonnet theory of gravity: The Gauss-Bonnet-Katz boundary term
Nathalie Deruelle, Nelson Merino, Rodrigo Olea
We propose a boundary term to the Einstein-Gauss-Bonnet action for gravity, which is constructed as the dimensional continuation of the Chern-Weil theorem, and such that the extrem…
A Java library to perform S-expansions of Lie algebras
C. Inostroza, I. Kondrashuk, N. Merino +1
The contraction method is a procedure that allows to establish non-trivial relations between Lie algebras and has had succesful applications in both mathematics and theoretical phy…
Pure Lovelock gravity and Chern-Simons theory
P. K. Concha, R. Durka, C. Inostroza +2
We explore the possibility of finding Pure Lovelock gravity as a particular limit of a Chern-Simons action for a specific expansion of the AdS algebra in odd dimensions. We derive…
Dynamical structure of Pure Lovelock gravity
Naresh Dadhich, Remigiusz Durka, Nelson Merino +1
We study dynamical structure of Pure Lovelock gravity in spacetime dimensions higher than four using the Hamiltonian formalism. The action consists of cosmological constant and a s…
Black hole solutions in Chern-Simons AdS supergravity
Gaston Giribet, Nelson Merino, Olivera Miskovic +1
We study charged AdS black hole solutions in five-dimensional Chern-Simons supergravity. The minimal supergroup containing such AdSxU(1) configurations is the superunitary group SU…
Generating infinite-dimensional algebras from loop algebras by expanding Maurer Cartan forms
R. Caroca, N. Merino, P. Salgado +1
It is shown that the expansion methods developed in refs. arXiv:hep-th/0212347 and arXiv:hep-th/0401033v2 can be generalized so that they permit to study the expansion of algebras…
A generalized action for -dimensional Chern--Simons gravity
José Díaz, Octavio Fierro, Fernando Izaurieta +4
We show that the so-called semi-simple extended Poincaré (SSEP) algebra in dimensions can be obtained from the anti-de~Sitter algebra by me…
Bianchi spaces and their 3-dimensional isometries as S-expansions of 2-dimensional isometries
Ricardo Caroca, Igor Kondrashuk, Nelson Merino +1
In this paper we show that some 3-dimensional isometry algebras, specifically those of type I, II, III and V (according Bianchi's classification), can be obtained as expansions of…
Generating Higher-Order Lie Algebras by Expanding Maurer Cartan Forms
Ricardo Caroca, Nelson Merino, Alfredo Pérez +1
By means of a generalization of the Maurer-Cartan expansion method we construct a procedure to obtain expanded higher-order Lie algebras. The expanded higher order Maurer-Cartan eq…
S-Expansion of Higher-Order Lie Algebras
Ricardo Caroca, Nelson Merino, Patricio Salgado
By means of a generalization of the S-expansion method we construct a procedure to obtain expanded higher-order Lie algebras. It is shown that the direct product between an Abelian…
Even-dimensional topological gravity from Chern-Simons gravity
Nelson Merino, Alfredo Perez, Patricio Salgado
It is shown that the topological action for gravity in 2n-dimensions can be obtained from the 2n+1-dimensional Chern-Simons gravity genuinely invariant under the Poincare group. Th…