标题： 黑洞周围存在第五种物质时的准正则模态 显示英文标题

标题： Quasinormal modes of a black hole surrounded by quintessence

摘要： 使用三阶WKB近似，我们评估了围绕被静态且球对称的第五元素包围的黑洞的质量为零的标量场扰动的准正则频率。 我们的结果表明，由于第五元素的存在，标量场衰减得更快。 此外，我们还注意到第五元素的状态参数 $\epsilon$ (压力 $p_q$与能量密度 $\rho_q$的比值) 对准正则频率起着重要作用。 当状态参数 $\epsilon$ 增加时，实部增加，虚部的绝对值减小。 这意味着在较大的 $\epsilon$ 第五元素情况下，标量场衰减得更慢。 显示英文摘要

摘要： Using the third-order WKB approximation, we evaluate the quasinormal frequencies of massless scalar field perturbation around the black hole which is surrounded by the static and spherically symmetric quintessence. Our result shows that due to the presence of quintessence, the scalar field damps more rapidly. Moreover, we also note that the quintessential state parameter $\epsilon$ (the ratio of pressure $p_q$ to the energy density $\rho_q$) play an important role for the quasinormal frequencies. As the state parameter $\epsilon$ increases the real part increases and the absolute value of the imaginary part decreases. This means that the scalar field decays more slowly in the larger $\epsilon$ quintessence case.