Quantum resources of the steady-state of three coupled qubits: Microscopic versus phenomenological model

Autor(es)

Diniz, E. C. ^[1] ; Costa, A. C. S. ^[2] ; Castelano, L. K. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Fis, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Parana, Dept Fis, Caixa Postal 19044, BR-81531980 Curitiba, Parana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Physics Letters A; v. 415, NOV 5 2021.
• Citações Web of Science: 1

Resumo

Quantum resources, such as entanglement, steering, and Bell nonlocality, are evaluated for three coupled qubits in the steady-state configuration. We employ the phenomenological master equation and the microscopic master equation to probe such quantum resources, which provide very different results depending on the system configuration. In particular, steering and Bell nonlocality are null within the phenomenological model, while they reach considerable values within the microscopic model. These results show that the phenomenological approach is not able to capture all quantum resources of the system. We also provide an analytical expression for the steady-state and quantum resources of the system composed of three coupled qubits in the zero temperature limit. Such results demonstrate that quantum resources between two qubits are strongly affected by the third qubit in a nontrivial way. (C) 2021 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 19/09624-3 - Controle ótimo e informação quântica em nanoestruturas semicondutoras
• Beneficiário: Leonardo Kleber Castelano
• Modalidade de apoio: Auxílio à Pesquisa - Regular