2018
DOI: 10.3390/galaxies6010012
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Abstract: Abstract:The time problem is a problem of canonical quantum gravity that has long been known about; it is related to the relativistic invariance and the consequent absence of an explicit time variable in the quantum equations. This fact complicates the interpretation of the wave function of the universe. Following proposals to assign the clock function to a scalar field, we look at the scalar degree of freedom contained in f (R) theories. For this purpose we consider a quadratic f (R) theory in an equivalent f… Show more

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Cited by 2 publications
(2 citation statements)
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“…The quantization of these models, along the lines of Refs. [43,50] and its comparison with the pure bosonic case [48,51,52], will be the topic of upcoming work. Among other interesting aspects to be investigated, is deriving the modified Friedmann equation, reflecting the effect of fermions by means of a semi-classical approach [53].…”
Section: Discussionmentioning
confidence: 99%
“…The quantization of these models, along the lines of Refs. [43,50] and its comparison with the pure bosonic case [48,51,52], will be the topic of upcoming work. Among other interesting aspects to be investigated, is deriving the modified Friedmann equation, reflecting the effect of fermions by means of a semi-classical approach [53].…”
Section: Discussionmentioning
confidence: 99%
“…In an upcoming work, we will describe the supersymmetric quantum cosmology following from these models, along the lines of references [28,36], and its comparison with the pure bosonic case [39][40][41]. Other interesting aspects to be investigated in future work include the effect of fermions on the classical dynamics, which can be done using a semiclassical approach [42].…”
Section: Discussionmentioning
confidence: 99%