We investigate the roles of different environmental models on quantum correlation decay behavior of a two-qubit composite system interacting with two independent environments. The most common environmental models (the single-Lorentzian model, the squared-Lorentzian model, the two-Lorentzian model and bandgap model) are analyzed. First, we note that, for the weak coupling regime, the monotonic decay speed of the quantum correlation is mainly determined by the spectral density functions of these different environments. Then, by considering the strong coupling regime we find that, contrary to what is stated in the weak coupling regime, the dynamics of quantum correlation primarily depends on the non-Markovianity of the environmental models.
© 2012 Optical Society of America
Original Manuscript: March 22, 2012
Manuscript Accepted: May 27, 2012
Published: July 19, 2012
Ying-jie Zhang, Wei Han, Chuan-jia Shan, and Yun-jie Xia, "Decay of quantum correlation under different non-Markovian environmental models," J. Opt. Soc. Am. B 29, 2060-2065 (2012)