Transferência de estados quânticos em sistemas com desordem correlacionada do tipo trímero

• Ano de defesa: 2023
• Autor(a) principal: TEIXEIRA, Veronica Alves
• Orientador(a): MORAES, Fernando Jorge Sampaio
• Banca de defesa: SOUZA, Adauto José Ferreira de, MOURA, Francisco Anacleto Barros Fidelis de, ALMEIDA, Guilherme Martins Alves de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• dARK ID: ark:/57462/001300000bztd
• Idioma: por
• Instituição de defesa: Universidade Federal Rural de Pernambuco
• Programa de Pós-Graduação: Programa de Pós-Graduação em Física Aplicada
• Departamento: Departamento de Física
• País: Brasil
• Palavras-chave em Português: Computação quântica; Ondas de spin; Modelo de Heisenberg
• Área do conhecimento CNPq: CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9378

We investigate a Heisenberg quantum chain with correlated disorder for spin-spin coupling. In our model, the spin-spin terms were chosen as a binary distribution. To introduce local correlations we assume that one of the values of our binary disorder distribution always appears in ternary sequences. Using numerical diagonalization, we will investigate the role played by these short-range correlations in the transfer of quantum states between the ends of the magnon chain. The quality of the transfer is observed through the use of standard tools such as fidelity and concurrency and others that confirm such characteristics of the chain inside and outside the channel. Our calculations numerically demonstrate the existence of magnon transfer with good fidelity for some special resonances. We also show what kind of "exchange"interaction between the ends is required for the system to have magnon transfer.