%0 Journal Article
%T Quintessence models with an oscillating equation of state and their potentials
%A Zhao Wen
%A <br>赵文
%J 中国物理 B
%D 2007
%I 
%X In this paper, we investigate the quintessence models with an oscillating equation of state (EOS) and its potentials. From the constructed potentials, which have an EOS of $\omega_{\phi}=\omega_0+\omega_1\sin z$, we find that they are all the oscillating functions of the field $\phi$, and the oscillating amplitudes decrease (or increase) with $\phi$. From the evolutive equation of the field $\phi$, we find that this is caused by the expansion of the universe. This also makes it very difficult to build a model whose EOS oscillates forever. However one can build a model with EOS oscillating for a certain period of time. Then we discuss three quintessence models, which are the combinations of the invert power law functions and the oscillating functions of the field $\phi$. We find that they all follow the oscillating EOS.
%K quintessence
%K equation of state<br>势
%K 震荡
%K 平衡状态
%K 力学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=51EC29F0F1FE4796D71CA1144D326B95&yid=A732AF04DDA03BB3&vid=7801E6FC5AE9020C&iid=9CF7A0430CBB2DFD&sid=52592567AB946700&eid=EA99B0049CCE231E&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=52