Pure double-layer bubbles in quadratic F(R) gravity

ERNESTO F. EIROA; GRISELDA FIGUEROA AGUIRRE; JOSE M. M. SENOVILLA

PHYSICAL REVIEW D

AMER PHYSICAL SOC

Lugar: New York; Año: 2017 vol. 95 p. 124021 - 124021

1550-7998

We present a class of spherically symmetric spacetimes corresponding to bubbles separating two regions with constant values of the scalar curvature, or equivalently with two different cosmological constants, in quadratic F(R) theory. The bubbles are obtained by means of the junction formalism, and the matching hypersurface supports in general a thin shell and a gravitational double layer. In particular, we find that pure double layers are possible for appropriate values of the parameters of the model whenever the quadratic coefficient is negative. This is the first example of a pure double layer in a gravitational theory.