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arXiv 2102.03407hep-thgr-qc
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二维de Sitter时空中非最小耦合标量QED的能量动量张量和有效拉格朗日量

Energy-momentum tensor and effective Lagrangian of scalar QED with a nonminimal coupling in 2D de Sitter spacetime

Marzieh Akbari Ahmadmahmoudi, Ehsan Bavarsad

摘要:

在二维de Sitter时空($\mathrm{dS_{2}}$)的Poincaré面上,在均匀电场背景下,在非微扰量子电动力学(QED)的框架下研究了大质量复标量场的诱导单圈能量动量张量.我们还考虑了直接耦合的标量场的Ricci标量曲率,这是参数化的任意无量纲非最小耦合常数。我们评估了诱导能量动量张量的迹异常。我们表明,我们的结果感生的能量动量张量在零电场的情况下,和跟踪异常与现有的文献是一致的。此外,我们构造的单圈有效拉格朗日从诱导能量动量张量。

英文摘要:

We have studied the induced one-loop energy-momentum tensor of a massive complex scalar field within the framework of nonperturbative quantum electrodynamics (QED) with a uniform electric field background on the Poincaré patch of the two-dimensional de Sitter spacetime ($\mathrm{dS_{2}}$). We also consider a direct coupling the scalar field to the Ricci scalar curvature which is parameterized by an arbitrary dimensionless nonminimal coupling constant. We evaluate the trace anomaly of the induced energy-momentum tensor. We show that our results for the induced energy-momentum tensor in the zero electric field case, and the trace anomaly are in agreement with the existing literature. Furthermore, we construct the one-loop effective Lagrangian from the induced energy-momentum tensor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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