Conveners
Cosmology - Talks on specific topics
- Maria Luisa Chiofalo (Department of Physics, University of Pisa)
Cosmology - Talks on specific topics
- Rosa Poggiani (PI)
Cosmology - Talks on specific topics
- Rosa Poggiani (PI)
Cosmology - Talks on specific topics
- Rosa Poggiani (PI)
Cosmology - Talks on specific topics
- Scilla Degl'Innocenti (Istituto Nazionale di Fisica Nucleare)
Cosmology - Talks on specific topics
- Scilla Degl'Innocenti (Istituto Nazionale di Fisica Nucleare)
Cosmology - Talks on specific topics
- Jorge Yago Malo
In the leading paradigm of cosmology, most particles are created during a reheating period following inflation. Part of this creation proceeds via parametric resonance [1], a process referred to as preheating. Since inflation dilutes any pre-existing particles, the relevant fields are initially in their vacuum state and particle production is seeded by vacuum fluctuations, a phenomenon of...
Recent theoretical advancements in gravitational physics, particularly within the framework of the Geometric Trinity of Gravity, challenge the traditional assumptions on spacetime underlying General Relativity (GR). The Geometric Trinity comprises GR, grounded in the curvature of spacetime; the Teleparallel Equivalent of GR (TEGR), formulated in terms of torsion; and the Symmetric Teleparallel...
Ultracold atoms in optical lattices have become a crucial tool for exploring quantum many-body quantum problems. Enhanced control over atomic interactions and optical potentials has enabled the study of increasingly complex phenomena. Recently, several proposals suggested to simulate Hamiltonians, which occur in cosmological systems with curved metrics, using ultracold quantum gases[3,4]. In...
We build up a simple Lorentz invariant model of dark matter consisting of a massive, real, scalar field coupled to its massless, real scalar mediator field. From a mathematical point of view the model belongs to the Klein-Gordon-Wave family of models. The dynamics is ruled by a single parameter, containing the mass of the dark particles and their initial number. It is shown that if the latter...
When gravitational waves travel from their source to an observer, they interact with matter structures along their path, causing distinct deformations in their waveforms.
In this study we introduce a novel theoretical framework for wave optics effects in gravitational lensing, addressing the limitations of existing approaches. We achieve this by incorporating the proper time technique,...
The theory of inflation provides a mechanism to explain the structures we observe today in the Universe, like, e.g., the Cosmic Microwave Background (CMB) anisotropies, starting from quantum-mechanically generated fluctuations. However, this leaves us with the unanswered question: how did the quantum-to-classical transition, which leads to such structures, occur? During inflation, tensor...
In order to shed light on the quantum to classical transition of the
primordial perturbations during inflation, we investigated
the decoherence of a system of scalar curvature perturbations
induced by an unobservable environment of deep subhorizon tensorial
modes. We computed the associated corrections to the cosmological correlation
functions, looking for distinguishable signatures which...
In 1981 Bill Unruh established an analogy between hydrodynamic flow with a supersonic region and a black hole, initiating the research field of analogue gravity. One possibility to exploit this hydrodynamics/gravity analogy is to create analogue black holes within Bose-Einstein condensates. At sufficiently low temperatures, phonons, which are low-energy collective excitations of the...
