Artículos de revistas
Time-invariant discord in dynamically decoupled systems
Fecha
2015-12-07Registro en:
Physical Review A - Atomic, Molecular, and Optical Physics, v. 92, n. 6, 2015.
1094-1622
1050-2947
10.1103/PhysRevA.92.062109
2-s2.0-84950138198
2-s2.0-84950138198.pdf
Autor
Heriot-Watt University
University of Turku
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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.