48 citations · 107 across the 34 of their papers we have counts for
6 papers · 1 filter
The origin of the cosmological constant
Enrique Álvarez, Jesús Anero, Irene Sánchez-Ruiz
It is well-known that in unimodular gravity the cosmological constant is not sourced by a constant energy density, but rather appears as some sort of integration constant. In this…
Quantum gravity in JNW spacetime
Enrique Alvarez, Jesus Anero
In this paper we study the behavior of a scalar field coupled to gravitons on the Janis-Newman-Winicour background, which somewhat interpolates between Minkowski and Schwarzschild…
The one-loop unimodular graviton propagator in any dimension
Jesus Anero, Carmelo P. Martin, Eduardo Velasco-Aja
For unimodular gravity, we work out, by using dimensional regularization, the complete one-loop correction to the graviton propagator in any space-time dimension. The computation i…
The quantum dynamics of Lagrange multipliers
Enrique Álvarez, Jesús Anero, Carmelo P. Martin +1
When implementing a non-linear constraint in quantum field theory by means of a Lagrange multiplier, , it is often the case that quantum dynamics induce quadratic and even hi…
Physical charges versus conformal invariance in unimodular gravity
Enrique Alvarez, Jesus Anero, Irene Sanchez-Ruiz
Unimodularity can be implemented in different ways. In this paper we consider only the formulation of Unimodular Gravity in which the unimodular metric is obtained out of an unrest…
Variations on the Goroff-Sagnotti operator
Enrique Álvarez, Jesus Anero, Eduardo Velasco-Aja
The effect of modifying General Relativity with the addition of some higher dimensional operators, generalizations of the Goroff-Sagnotti operator, is discussed. We determine in pa…