Entanglement Dynamics of Two-Qubit System in Different Types of Noisy Channels
Shan Chuan-Jia, Jibing Liu, Cheng Wei-Wen, Tang-Kun Liu, Huang Yan-Xia, Hong Li · Communications in Theoretical Physics · 2009
In this paper, we study entanglement dynamics of a two-qubit extended Werner-like state locally interacting with independent noisy channels, i.e., amplitude damping, phase damping, and depolarizing channels. We show that the purity of initial entangled state has direct impacts on the entanglement robustness in each noisy channel. That is, if the initial entangled state is prepared in mixed instead of pure form, the state may exhibit entanglement sudden death (ESD) and/or be decreased for the critical probability at which the entanglement disappear.