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J. Phys. B: At. Mol. Opt. Phys. 41, 155501 (2008)


Entanglement dynamics for a six-qubit model in cavity QED

Z. X. Man, Y. J. Xia, and Nguyen Ba An

We study entanglement dynamics for a six-qubit model in cavity QED, where three two-level atoms A,B and C are initially prepared in a Greenberger–Horne–Zeilinger (GHZ)-like state and locally coupled with the independent cavities a, b and c, respectively. We consider entanglement evolution via negativity for the tripartite subsystems of atoms and the corresponding cavities. By choosing two types of GHZ-like states as atomic initial states, we shall show that the entanglement of atoms may or may not exhibit entanglement sudden death (ESD) depending on the type of atomic initial state.