42 citations · 284 across the 38 of their papers we have counts for
9 papers · 1 filter
The Big Bang and the Quantum
Abhay Ashtekar
This short review is addressed to cosmologists. General relativity predicts that space-time comes to an end and physics comes to a halt at the big-bang. Recent developments in loop…
Expanding universes in the conformal frame of gravity
John Miritzis, Roberto Giambò
The late time evolution of Friedmann-Robertson-Walker (FRW) models with a perfect fluid matter source is studied in the conformal frame of gravity. We assume that the corre…
Massive gravitational waves from the Cosmic Defect theory
Ninfa Radicella, Angelo Tartaglia
The Cosmic Defect theory (CD), which is presented elsewhere in this conference, introduces in the standard Einstein-Hilbert Lagrangian an elastic term accounting for the strain of…
From Elastic Continua to Space-time
Angelo Tartaglia, Ninfa Radicella
Since the early days of the theory of electromagnetism and of gravity the idea of space, then space-time, as a sort of physical continuum hovered the scientific community. Actually…
Dynamics driven by the Trace Anomaly in FLRW Universes
J. F. Koksma
By means of a semiclassical analysis we show that the trace anomaly does not affect the cosmological constant. We calculate the evolution of the Hubble parameter in quasi de Sitter…
Running Cosmological Constant and Running Newton Constant in Modified Gravity Theories
Remo Garattini
We discuss how to extract information about the cosmological constant from the Wheeler-DeWitt equation, considered as an eigenvalue of a Sturm-Liouville problem in a de Sitter and…