TY  - JOUR
AU  - Nascimento, J. R.
AU  - Olmo, G. J.
AU  - Porfirio, P. J.
AU  - Petrov, A. Y.
AU  - Soares, A. R.
PY  - 2020
DA  - 2020//
TI  - Nonlinear sigma-models in the Eddington-inspired Born-Infeld gravity
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 064043
EP  - 11pp
VL  - 101
IS  - 6
PB  - Amer Physical Soc
AB  - In this paper we consider two different nonlinear sigma-models minimally coupled to Eddington-inspired Born-Infeld gravity. We show that the resultant geometries represent minimal modifications with respect to those found in GR, though with important physical consequences. In particular, wormhole structures always arise, though this does not guarantee by itself the geodesic completeness of those space-times. In one of the models, quadratic in the canonical kinetic term, we identify a subset of solutions which are regular everywhere and are geodesically complete. We discuss characteristic features of these solutions and their dependence on the relationship between mass and global charge.
SN  - 2470-0010
UR  - https://arxiv.org/abs/1912.10779
UR  - https://doi.org/10.1103/PhysRevD.101.064043
DO  - 10.1103/PhysRevD.101.064043
LA  - English
N1  - WOS:000521099300008
ID  - Nascimento_etal2020
ER  -