Sun, GuozhuZhou, ZhongyuanMao, BoWen, XuedaWu, PeihengHan, Siyuan2015-04-242015-04-242012-08-01Guozhu Sun, Zhongyuan Zhou, Bo Mao, Xueda Wen, Peiheng Wu, and Siyuan Han. "Entanglement dynamics of a superconducting phase qubit coupled to a two-level system." Phys. Rev. B 86, 064502 – Published 1 August 2012. http://dx.doi.org/10.1103/PhysRevB.86.064502.https://hdl.handle.net/1808/17514This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevB.86.064502.We report the observation and quantitative characterization of driven and spontaneous oscillations of quantum entanglement, as measured by concurrence, in a bipartite system consisting of a macroscopic Josephson phase qubit coupled to a microscopic two-level system. The data clearly show the behavior of entanglement dynamics such as sudden death and revival, and the effect of decoherence and ac driving on entanglement.Article10.1103/PhysRevB.86.064502openAccess