TY - JOUR
T1 - A universe from a Lagrangian fixed point
AU - Alvarez, Pedro D.
AU - Koch, Benjamin
AU - Riahinia, Ali
AU - Rincón, Ángel
N1 - Publisher Copyright:
© 2024
PY - 2024/12
Y1 - 2024/12
N2 - In this paper, we investigate the theoretical possibility that a Lagrangian fixed point, when applied to cosmological models, can drive dynamical evolution towards a bouncing universe. We analyze the physics of a Lagrangian fixed point within the context of a gravitational average effective action featuring scale-dependent couplings. To explore this concept, we develop a toy model set in a four-dimensional, spatially flat spacetime, anchored by a Lagrangian fixed point. Solving the cosmological equations of this model analytically, we identify several non-trivial solution branches. These branches are characterized by a modified scale factor and dynamic gravitational couplings, offering new insights into the behavior of cosmological models under these conditions.
AB - In this paper, we investigate the theoretical possibility that a Lagrangian fixed point, when applied to cosmological models, can drive dynamical evolution towards a bouncing universe. We analyze the physics of a Lagrangian fixed point within the context of a gravitational average effective action featuring scale-dependent couplings. To explore this concept, we develop a toy model set in a four-dimensional, spatially flat spacetime, anchored by a Lagrangian fixed point. Solving the cosmological equations of this model analytically, we identify several non-trivial solution branches. These branches are characterized by a modified scale factor and dynamic gravitational couplings, offering new insights into the behavior of cosmological models under these conditions.
KW - Bouncing cosmology
KW - Cosmology
KW - Lagrangian fixed point
KW - Modified theories of Gravity
KW - Scale-dependent couplings
UR - http://www.scopus.com/inward/record.url?scp=85205558597&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/72efa619-bbda-356f-926e-5421f74126eb/
U2 - 10.1016/j.dark.2024.101674
DO - 10.1016/j.dark.2024.101674
M3 - Article
AN - SCOPUS:85205558597
SN - 2212-6864
VL - 46
JO - Physics of the Dark Universe
JF - Physics of the Dark Universe
M1 - 101674
ER -