https://doi.org/10.1140/epjd/e2012-20636-1
Regular Article
Entanglement properties of atoms in the Kerr-nonlinear blackbody
1 Shandong Provincial Key Laboratory of Atomic and Molecular Physics, Department of Physics, Ludong University, YanTai 264025, P.R. China
2 Rizhao Polytechnic University, Rizhao 276826, P.R. China
3 Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
a
e-mail: xuqf5678@163.com
Received: 1 November 2011
Received in final form: 22 December 2011
Published online: 19 April 2012
We study the entanglement properties of two-qubits and multi-qubits interacting with local reservoirs in Kerr-nonlinear blackbody (KNB). Death and birth of the entanglement can be controlled by adjusting the temperature T and the coupling coefficient γ in KNB. For initial entangled states with local thermal reservoirs, we also demonstrate that the system always becomes disentangled for a finite time at finite temperature T. General conditions are derived under which entanglement sudden death (ESD) can be hastened, delayed or averted. Therefore, our results provide a clear clue on how to preserve the entanglement for quantum information processing in a given KNB environments.
Key words: Quantum Optics
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2012
