More than 65 years ago, John Wheeler suggested that quantum uncertainties of the metric
would be of order one at the Planck scale, leading to large fluctuations in spacetime …

We discuss effects of loss of coherence in low energy quantum systems caused by or related
to gravitation, referred to as gravitational decoherence. These effects, resulting from random …

The tension between the value of the Hubble constant H_0 H 0 determined from local
supernovae data and the one inferred from the cosmic microwave background based on the …

Black holes, initially thought of as very interesting mathematical and geometric solutions of
general relativity, over time, have come up with surprises and challenges for modern …

The eternal inflation problem continues to be considered one of standard's cosmology most
serious shortcomings. This arises when one considers the effects of" quantum fluctuations" …

In this work we consider a wide variety of alternatives opened when applying the continuous
spontaneous localization (CSL) dynamical collapse theory to the inflationary era. The …

The gravitational collapse of massive stars serves to manifest the most severe deviations of
general relativity with respect to Newtonian gravity: the formation of horizons and spacetime …

Starting from an idea of SL Adler [in Quantum Nonlocality and Reality: 50 Years of Bell's
Theorem, edited by M. Bell and S. Gao (Cambridge University Press, Cambridge, England …

In the last decade, the study of the overall shape of the universe, called Cosmic Topology,
has become testable by astronomical observations, especially the data from the Cosmic …

Inflation, a period of exponential expansion in the early Universe, is considered an important
part of the standard Λ CDM cosmological model, and plays a crucial role in explaining a …