4 papers · 1 filter
Gauge-invariant non-universal scalar couplings in teleparallel gravity
Giovanni Otalora, Rudranil Roy
We develop a gauge-invariant teleparallel framework in which the universality of the gravitational coupling is relaxed for a scalar field, while the gravitational sector retains th…
Non-minimally coupled loop quantum inflation with inverse-volume corrections
Rudranil Roy, Giovanni Otalora, Joel Saavedra +1
We study slow-roll inflation driven by a scalar field non-minimally coupled to gravity within the effective framework of Loop Quantum Cosmology (LQC), including inverse-volume corr…
Thermality of the zero-point length and gravitational selfduality
P. Fernandez de Cordoba, J. M. Isidro, Rudranil Roy
It has been argued that the existence of a zero-point length is the hallmark of quantum gravity. In this letter we suggest a thermal mechanism whereby this quantum of length arises…
Spacetime metric from quantum-gravity corrected Feynman propagators
P. Fernandez de Cordoba, J. M. Isidro, Rudranil Roy
Differentiation of the scalar Feynman propagator with respect to the spacetime coordinates yields the metric on the background spacetime that the scalar particle propagates in. Now…