Time-invariant discord in dynamically decoupled systems

Autor(es)

Addis, Carole ^[1] ; Karpat, Goktug ^{[2, 3]} ; Maniscalco, Sabrina ^[2]

Afiliação do(s) autor(es)

^[1] Heriot Watt Univ, SUPA, EPS Phys, Edinburgh EH14 4AS, Midlothian - Scotland

^[2] Univ Turku, Dept Phys & Astron, Turku Ctr Quantum Phys, FIN-20014 Turun - Finland

^[3] Univ Estadual Paulista, UNESP, Fac Ciencias, BR-17033360 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Physical Review A; v. 92, n. 6 DEC 7 2015.
• Citações Web of Science: 6

Resumo

Dynamical decoupling protocols are one of the most used tools for efficient quantum error corrections and for reservoir engineering. In this paper we study the effect of dynamical decoupling pulses on the preservation of both quantum and classical correlations, and their influence on the intriguing phenomenon of time-invariant discord. We study two qubits experiencing local dephasing with an Ohmic class spectrum and subject to dynamical decoupling protocols. We investigate the connection between the dynamics of both classical and quantum correlations and the behavior of information flow between system and environment. Finally, we establish a set of necessary conditions for which time-invariant discord can be created using dynamically decoupling techniques. (AU)

• Processo FAPESP: 14/20941-7 - Não-Markovianidade em redes quânticas
• Beneficiário: Goktug Karpat
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado