Ph.D. in Physics

Eventi del Dottorato

Dottorato in Fisica

Journal Club Seminari 2022

28/10/2022 ore 15:00
aula C
ore 15:00 Leonardo Perin
(DOTTORATO IN FISICA) Molecular Dynamics Simulations Of Supercooled Aqueous Solutions -
Molecular dynamics are a powerful tool for the study of the properties of systems by analyzing the physical movements of the atoms. The trajectories of atoms are determined by numerically solving the equation of motion given the interatomic potential, and from these trajectories thermodynamic, dynamic and structural properties are determined. Here we present a molecular dynamics simulation study of a supercooled LiCl aqueous solution. The purpose is to study how the anomalous behavior of water changes in the presence of the solute, in particular the temperature of maximum density (TMD) line and the liquid-liquid critical point (LLCP) are examined. Structural properties are also examined through the study of the radial distribution functions
ore 15:45 Matteo Romoli
(DOTTORATO IN FISICA) Double copy correspondence: a relation between gravity and gauge theories
The double copy correspondence provides a novel perspective on the relation between gravity and gauge theories. In simple terms, it is based on the idea that gravity can be written as a sort of square of two Yang-Mills gauge theories. This was first proposed in the context of amplitudes for which, at tree level, the correspondence is a proved theorem and it is also really promising when dealing with loops corrections. The Lagrangian formulation is not yet as well studied, even if some progress has been made in the last years. In this context, I am exploring the possibility for a double copy correspondence for asymptotic symmetries.
ore 16:30 Simone Marciano
(DOTTORATO IN FISICA) Leptogenesis From U(1) Flavour Symmetry
We present a simple extension of the Standard Model with three right-handed neutrinos in a SUSY framework, with an additional U(1)F abelian flavor symmetry with a non standard leptonic charge Le −Lμ −Lτ for lepton doublets and arbitrary right-handed charges. The model is able to reproduce the experimental values of the mixing angles of the PMNS matrix and of the r = Δm2sun/Δm2atm ratio, with only a moderate fine tuning of the Lagrangian free parameters. The baryon asymmetry of the Universe is generated via thermal leptogenesis through CP-violating decays of the heavy right- handed neutrinos. We present a detailed numerical solution of the relevant Boltzmann Equations (BE
Chair:

info: journal club time table

ore 15:00	Leonardo Perin (DOTTORATO IN FISICA)	Molecular Dynamics Simulations Of Supercooled Aqueous Solutions - Molecular dynamics are a powerful tool for the study of the properties of systems by analyzing the physical movements of the atoms. The trajectories of atoms are determined by numerically solving the equation of motion given the interatomic potential, and from these trajectories thermodynamic, dynamic and structural properties are determined. Here we present a molecular dynamics simulation study of a supercooled LiCl aqueous solution. The purpose is to study how the anomalous behavior of water changes in the presence of the solute, in particular the temperature of maximum density (TMD) line and the liquid-liquid critical point (LLCP) are examined. Structural properties are also examined through the study of the radial distribution functions
ore 15:45	Matteo Romoli (DOTTORATO IN FISICA)	Double copy correspondence: a relation between gravity and gauge theories The double copy correspondence provides a novel perspective on the relation between gravity and gauge theories. In simple terms, it is based on the idea that gravity can be written as a sort of square of two Yang-Mills gauge theories. This was first proposed in the context of amplitudes for which, at tree level, the correspondence is a proved theorem and it is also really promising when dealing with loops corrections. The Lagrangian formulation is not yet as well studied, even if some progress has been made in the last years. In this context, I am exploring the possibility for a double copy correspondence for asymptotic symmetries.
ore 16:30	Simone Marciano (DOTTORATO IN FISICA)	Leptogenesis From U(1) Flavour Symmetry We present a simple extension of the Standard Model with three right-handed neutrinos in a SUSY framework, with an additional U(1)F abelian flavor symmetry with a non standard leptonic charge Le −Lμ −Lτ for lepton doublets and arbitrary right-handed charges. The model is able to reproduce the experimental values of the mixing angles of the PMNS matrix and of the r = Δm2sun/Δm2atm ratio, with only a moderate fine tuning of the Lagrangian free parameters. The baryon asymmetry of the Universe is generated via thermal leptogenesis through CP-violating decays of the heavy right- handed neutrinos. We present a detailed numerical solution of the relevant Boltzmann Equations (BE
Chair: