1,885 research outputs found
A note on oscillating neutrino states in quantum field theory
No full textIn a recent paper [Eur. Phys. J. C80, 68 (2020)], a definition of oscillating neutrino states in quantum field theory was proposed. We show that such definition can be derived as a particular case of the Blasone–Vitiello approach, when mass vacuum is chosen as the physical vacuum. We discuss some problems of such an approach, which appears to be mathematically inconsistent and physically not acceptable
A Physicist's view on Chopin's Etudes
No full textWe propose the use of specific dynamical processes and more in general of ideas from Physics to model the evolution in time of musical structures. We apply this approach to two Ãtudes by F. Chopin, namely Op.10 n.3 and Op.25 n.1, proposing some original description based on concepts of symmetry breaking/restoration and quantum coherence, which could be useful for interpretation. In this analysis, we take advantage of colored musical scores, obtained by implementing Scriabinâs color code for sounds to musical notation
New results in the physics of neutrino oscillations
No full textI report on recent theoretical results about neutrino mixing and oscillations. I show that in Quantum Field Theory, mixing transformations are not trivial and the vacuum for the mixed fields has a condensate structure. This fact has phenomenological consequences on neutrino oscillations: the oscillation formula turns out to have an additional oscillating piece and energy dependent amplitudes. The usual Pontecorvo formula is recovered in the relativistic limit. I report also about preliminary results on the presence of a topological (Berry) phase for oscillating neutrinos
Topological defects as inhomogeneous condensates in quantum field theory: Kinks in (1+1) dimensional lambda psi(4) theory
No full textBateman's dual system revisited: quantization, geometric phase and relation with the ground-state energy of the linear harmonic oscillator
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