Chinese Optics Letters, 2010, 8 (5): 524, Published Online: May. 11, 2010
Entanglement dynamics of W-like states in an open system
对纠缠 concurrence 纠缠猝死(突然产生) 纠缠转移 270.1670 Coherent optical effects 270.2500 Fluctuations, relaxations, and noise
Abstract
The pairwise entanglement dynamics in a multipartite open system consisting of three entangled cavity photons locally coupled with independent N-mode reservoirs is studied via concurrence. The initial states of cavity photons are prepared in two types of W-like states while the corresponding reservoirs are prepared in the factorable vacuum state. The result shows that all the pairwise concurrences of the total system including cavities and reservoirs undergo qualitatively different dynamical behaviors. Among the two W-like states, only one could exhibit entanglement sudden death (ESD) leading the corresponding reservoirs to exhibit entanglement sudden birth. In addition, by taking the entanglement of the corresponding reservoirs into account, entanglement invariants are constructed for the W-like state that does not undergo ESD.
Feng Han, Yunjie Xia. Entanglement dynamics of W-like states in an open system[J]. Chinese Optics Letters, 2010, 8(5): 524.