Emaranhamento mediado por caos em um ponto quântico aberto via formalismo de Keldysh

• Ano de defesa: 2019
• Autor(a) principal: Batista, Rafael Alves
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraíba; Brasil; Física; Programa de Pós-Graduação em Física; UFPB
• Palavras-chave em Português: Física da matéria condensada; Pontos quânticos caóticos; Ruído; Emaranhamento quântico; Desigualdade de Bell; Formalismo de Keldysh; Condensed matter physics; Chaotic quantum dots; Shot noise; Quantum entanglement; Bell’s inequality; Keldysh formalism; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/123456789/26106

In this dissertation, we investigate universal properties of the electronic transportation in mesoscopic system using chaotic quantum dots, which the geometry of such semiconductors change constantly. We use nonequilibrium quantum field theory (Keldysh formalism) to describe the electronic transport through the quantum dots and to investigate the theoretics consequences in a chaotic case. Following Beenaker’s proposal and performing numerical simulations, we analyze the electronic conductance and shot noise in such devices, comparing with the literature, and the connection between shot noise and quantum entanglement. We also investigate the Bell’s inequality, we show new results which establish a link between the chaos in a chaotic quantum dot and the creation of quantum entanglement.