Physics – Quantum Physics
Scientific paper
2009-11-10
Phys. Rev. A 81, 014101 (2010)
Physics
Quantum Physics
5 pages, 5 figures
Scientific paper
10.1103/PhysRevA.81.014101
We study the non-Markovian effect on the dynamics of the quantum discord by exactly solving a model consisting of two independent qubits subject to two zero-temperature non-Markovian reservoirs, respectively. Considering the two qubits initially prepared in Bell-like or extended Werner-like states, we show that there is no occurrence of the sudden death, but only instantaneous disappearance of the quantum discord at some time points, in comparison to the entanglement sudden death in the same range of the parameters of interest. It implies that the quantum discord is more useful than the entanglement to describe quantum correlation involved in quantum systems.
Chen Ze-Qian
Feng Mang
Wang Bo
Xu Zhen Yu
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