Entanglement dynamics of W-like states within the framework of triple Jaynes-Cummings model

• Published in: Journal of modern optics Vol. 56; no. 8; pp. 1022 - 1028
• Main Authors: Man, Zhong-Xiao, Xia, Yun-Jie, Ba An, Nguyen
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis Group 10-05-2009; Taylor & Francis; Taylor & Francis Ltd
• Subjects: Atoms & subatomic particles; Classical and quantum physics: mechanics and fields; entanglement dynamics; entanglement sudden death; Exact sciences and technology; Foundations, theory of measurement, miscellaneous theories (including aharonov-bohm effect, bell inequalities, berry's phase); Mathematical models; Matrix; Optics; Physics; Quantum information; Quantum mechanics; Quantum theory; W-like states; W states; Two atom system; Two level atom; Quantum entanglement; Jaynes-Cummings model; Time evolution; Quantum information
• ISSN: 0950-0340; 1362-3044
• DOI: 10.1080/09500340902887666

Entanglement dynamics of two atomic W-like states is studied within the framework of a triple Jaynes-Cummings model. It is shown that the two states, though initially being equivalent under simple local operations and thus having the same amounts of pairwise entanglements, undergo qualitatively different evolutions. Namely, one of them may suffer from the so-called entanglement sudden death depending on the parameters, while the other one does not for whatever parameters.