Master equation for dissipative interacting qubits in a common environment

Autor(es)

Santos, J. P. ^{[1, 2]} ; Semiao, F. L. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Sao Paulo - Brazil

^[2] Queens Univ Belfast, Sch Math & Phys, Ctr Theoret Atom Mol & Opt Phys, Belfast BT7 1NN, Antrim - North Ireland

• Tipo de documento: Artigo Científico
• Fonte: Physical Review A; v. 89, n. 2 FEB 28 2014.
• Citações Web of Science: 10

Resumo

In this paper, we derive a microscopic master equation for a pair of XY-coupled two-level systems interacting with the same memoryless reservoir. In particular, we apply this master equation to the case of a pair of two-level atoms in free space where we can clearly contrast the predictions made with the microscopic master equation obtained here and the phenomenological approaches where the atom-atom coupling is included just a posteriori, i.e., not taking into account in the derivation of the open system equation of motion. We show, for instance, that the phenomenological approach fails completely in the assessment of the role played by the symmetric and antisymmetric decay channels. As a consequence, the predictions related to collective effects such as superradiance, for instance, are misleading in the phenomenological approach. We also obtain the fluorescence spectrum using the microscopic model developed here. (AU)

• Processo FAPESP: 11/09258-5 - Descrição Quântica da Excitação de Biomoléculas com Pulsos de um Fóton
• Beneficiário: Jader Pereira dos Santos
• Modalidade de apoio: Bolsas no Brasil - Doutorado