Non-perturbative gauge invariant scalar fluctuations of the metric in Higgs inflation from complex geometrical scalar–tensor theory of gravity

Dark energy from a geometrical gauge scalar-tensor theory of gravity

“…With the intention to avoid the cosmological constant problem many proposals to explain the cosmic acceleration have appeared. Dynamical cosmological constant [12][13][14][15] and different versions of quintessence models [16][17][18] can be found within these proposals . An interesting feature of the class of quintessence models is that dark energy is driven by a scalar field similar to what happens in the early inflationary epoch of the Universe.…”

“…This theory is also known as geometrical gauge scalar-tensor theory of gravity [13,17]. Different topics have studied in the light of these frameworks, for example interacting quintessence scenarios [17], scalar fluctuations of the metric during inflation [18], generation of the seeds of cosmic magnetic fields during inflation [25], Higgs inflation frameworks [18,26], (1 + 2)-dimensional gravity [27] and viscous cosmology [28], among others.…”

“…A disformal generalization of a Weyl structure is studied in [35]. Moreover, in this geometrical approach a Higgs inflationary period can be modeled without the unitarity problem [18,26]. Thus results of interest to find out if a late time cosmological scenario can be described in this theory.…”