4 papers
Some aspects of QFT in non-inertial frames
Enrique Ãlvarez, Jesús Anero
Some aspects of quantum field theory in a general (i.e. non inertial) frame of Minkowski spacetime are studied. Conditions for the presence of horizons as well as for the modificat…
Some consequences of the Kerr-Schild gauge
Enrique Ãlvarez, Jesús Anero
Generalized Kerr-Schild nilpotent deformations of an arbitrary background spacetime $\overline{g}_{\m\n}(x)$ are considered. Those are of the form $\overline{g}_{\m\n}+l_\m l_\n$ w…
The origin of the cosmological constant
Enrique Ãlvarez, 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…
Superposition of gravitational fields
Enrique Ãlvarez, Jesús Anero
Linear superposition of gravitational fields is shown to be possible for a large class of spacetimes, in some specific coordinates. Explicit examples are presented.