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Abstract:
I will review recent work on flavor and chiral oscillations in the context of quantum field theory, considering both perturbative and non-perturbative approaches.
The quantization of mixed fields (neutrinos, in particular) has revealed a surprisingly rich mathematical structure, due to the inequivalence of the representations for fields with definite mass and those with definite flavor. I will argue for the physical relevance of exact flavor neutrino states, which are associated with a condensate of particle–antiparticle pairs in the (flavor) vacuum, induced by a Bogoliubov transformation. Phenomenological consequences of this result will be discussed.
Based on the analogy between oscillating neutrinos and unstable particles, I will show that finite-time perturbation theory correctly reproduces the exact oscillation formula obtained through the non-perturbative flavor Fock space approach.
Similar results have been found in the case of chiral oscillations: the states generated by charged-current weak interactions with definite chirality are consistently defined via a Bogoliubov transformation, which diagonalizes the relevant operators - i.e., the chiral charges. In this case as well, a perturbative treatment confirms the results obtained through the non-perturbative approach.
Finally, I will briefly report on recent findings regarding the quantum correlations associated with neutrino oscillations, which suggest their potential use as a tool for quantum information tasks.
References:
M.B. and G.Vitiello, Quantum field theory of fermion mixing, Ann. Phys. (1995)
M.B., P.Henning and G.Vitiello, The exact formula for neutrino oscillations, Phys. Lett. B (1999)
M.B., F.Giacosa, L.Smaldone and G.Torrieri, Neutrino oscillations in the interaction picture, EPJC (2023)
V.Bittencourt, M.B. and G.Zanfardino, Chiral oscillations in quantum field theory, Phys. Lett. B (2025)
M.B., F.Dell'Anno, S.De Siena and F.Illuminati, Entanglement in neutrino oscillations, EPL (2009)
Biography:
Massimo Blasone, Associate Professor of Theoretical Physics at Department of Physics, Salerno University (Italy). He has been visiting Fellow (ESF) at Freie Universitat Berlin and Research Associate at Imperial College London.
His research interests include Quantum Field Theory, neutrino physics, thermal field theories, foundations of quantum theory & quantum information. He is coauthor of a book on quantum field theory for Imperial College Press.
He has also a degree in Piano and recently is investigating the impact of physical concepts in musical interpretation.
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