Wake potential in a strong coupling plasma from the AdS/CFT correspondence

Wake potential in a strong coupling plasma from the AdS/CFT correspondence
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AdS/CFT 对应关系中强耦合等离子体中的唤醒电势

DOI:
10.1103/physrevd.93.085011
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发表时间:
2015-02
期刊:
影响因子:
5
通讯作者:
Liu Hui
Liu Hui
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Liu Lian;Liu Hui

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利用AdS/CFT对应计算的介电函数,研究了强耦合等离子体中快速运动电荷诱导的尾流势,并与弱耦合等离子体中粒子速度为v=0.55c$和v=0.99c$时的尾流势进行了比较。强、弱尾流势之间最显著的区别是,当v=0.99c时,弱耦合下类切伦科夫辐射和马赫锥引起的显著振荡在强耦合下消失,这意味着强耦合等离子体中不存在相速度低于光速的等离子体模。
With the dielectric function computed from AdS/CFT correspondence, we studied the wake potential induced by a fast moving charge in strong coupling plasma, and compared it with the weak coupling wake potential for different particle velocities as $v=0.55c$ and $v=0.99c$. The most prominent difference between strong and weak wake potential is that when $v=0.99c$ the remarkable oscillation due to Cerenkov-like radiation and Mach cone in weak coupling disappears in strong coupling, which implies that the plasmon mode with phase velocity lower than the speed of light dose not exist in strong coupling plasma.
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