Schwinger pair production by electric field coupled to inflaton
Schwinger pair production by electric field coupled to inflaton
复制标题
通过与暴胀子耦合的电场产生施温格电子对
DOI：
10.1088/1475-7516/2018/02/018
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发表时间：
2018
影响因子：
6.4
通讯作者：
Zhu Tao
中科院分区：
文献类型：
--
作者：
Geng Jia Jia;Li Bao Fei;Soda Jiro;Wang Anzhong;Wu Qiang;Zhu Tao
我们用一致渐近近似方法解析地研究了de Sitter背景下的Schwinger对产生，证明了运动方程一般有两个转折点，这些转折点的性质可以是单转折点、双转折点、真实的转折点或复转折点，这取决于理论中自由参数的选择.这些点的不同性质导致不同的电流。特别是当β <$m 2/H 2− 9/4为正时，两个转折点都是复杂的，并且由于施温格过程产生的电流被高度抑制，其中m和H分别表示粒子的质量和哈勃参数。为了使转折点是真实的，必须使β< 0，并且β越负，越容易产生粒子。此外，当β< 0时，我们还研究了电场E很弱时的粒子产生。我们发现，在这种情况下，电流与E 1/2− 1成正比。| β|在弱电场极限下，当m<0.2H时，该效应强烈增强.
We analytically investigate the Schwinger pair production in the de Sitter background by using the uniform asymptotic approximation method, and show that the equation of motion in general has two turning points, and the nature of these points could be single, double, real or complex, depending on the choice of the free parameters involved in the theory. Different natures of these points lead to different electric currents. In particular, when β≡ m 2/H 2− 9/4 is positive, both turning points are complex, and the electric current due to the Schwinger process is highly suppressed, where m and H denote, respectively, the mass of the particle and the Hubble parameter. For the turning points to be real, it is necessary to have β< 0, and the more negative of β, the easier to produce particles. In addition, when β< 0, we also study the particle production when the electric field E is very weak. We find that the electric current in this case is proportional to E 1/2−√| β|, which is strongly enhanced in the weak electric field limit when m<√ 2 H.