Physical renormalization condition for de Sitter QED
Physical renormalization condition for de Sitter QED
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DOI：
10.1103/physrevd.97.105010
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发表时间：
2018-02
影响因子：
5
通讯作者：
Takahiro Hayashinaka;S. Xue
中科院分区：
文献类型：
--
作者：
Takahiro Hayashinaka;S. Xue
我们考虑了de Sitter时空中均匀恒定电场背景诱导的标量和旋量流真空期望值的一个新的重整化条件。在半经典论证的基础上，提出了最大减法条件，对重整化电流的大质量带电粒子极限进行了指数抑制。最大减法改变了以前由传统的最小减法方案获得的感应电流的行为。最大减法有利于一对夫妇的物理体面的预测，包括相同的渐近行为的标量和旋量电流，去除红外（IR）超导性的标量电流，和有限的电流的无质量费米子。
We considered a new renormalization condition for the vacuum expectation values of the scalar and spinor currents induced by a homogeneous and constant electric field background in de Sitter spacetime. Following a semiclassical argument, the condition named maximal subtraction imposes the exponential suppression on the massive charged particle limit of the renormalized currents. The maximal subtraction changes the behaviors of the induced currents previously obtained by the conventional minimal subtraction scheme. The maximal subtraction is favored for a couple of physically decent predictions including the identical asymptotic behavior of the scalar and spinor currents, the removal of the infrared (IR) hyperconductivity from the scalar current, and the finite current for the massless fermion.