Dissertação de Mestrado #591: Edson Nogueira
Entanglement, decoherence and estimation in neutrino oscillations
Autor: Edson Cezar Moraes Nogueira
Banca Avaliadora
Marcos Donizeti Rodrigues Sampaio (orientador)
Física - UFMG
Nelson de Oliveira Yokomizo
Física - UFMG
Raphael Drummond
Matemática - UFMG
Orientadores
Marcos Donizeti Rodrigues Sampaio (orientador)
Departamento de Física
Resumo do Trabalho
In this work, we studied neutrino oscillations and its main quantum mechanical aspects, namely entanglement and decoherence. We also investigated it from a quantum metrology perspective. The main features from the quantum field theoretic description of the phenomenon were reviewed and the chief quantum mechanical models were discussed and used to analyse the influence of entanglement and decoherence on the quantum Fisher information related to the mixing angle. We have founded that, although in a variety of physical settings there is a positive relationship between entanglement and the quantum Fisher information, this is not the case in the neutrino oscillations scenario. This shows that, in single-particle settings, entanglement is not directly related to the optimal estimation in metrological tasks.