arXiv 0909.10322009-09hep-thgr-qchep-ph

关于广义Born-Infeld电动力学

On generalized Born--Infeld electrodynamics

S. I. Kruglov

备注：: 13 pages, minor corrections, published version
发表信息：: J.Phys.A43:375402,2010
DOI：: 10.1088/1751-8113/43/37/375402

摘要：

研究了具有两个参数的广义Born-Infeld电动力学。该模型考虑了线偏振激光束在外加横向磁场中的传输。结果表明，存在真空双折射的影响，我们评估诱导椭圆率。从BRST和PVLAS合作的实验数据中引入的参数组合的上界。当两个参量相等时，我们得到玻恩-因菲尔德电动力学，真空双折射效应消失。我们发现规范和对称的Belinfante能量动量张量。能量动量张量的迹不为零，伸缩对称性被破缺。膨胀流的四重散度等于贝林凡特能量-动量张量的迹，并与模型参数（场强的维数）成正比。在所考虑的模型中，对偶对称性也被打破。

英文摘要：

The generalized Born--Infeld electrodynamics with two parameters is investigated. In this model the propagation of a linearly polarized laser beam in the external transverse magnetic field is considered. It was shown that there is the effect of vacuum birefringence, and we evaluate induced ellipticity. The upper bounds on the combination of parameters introduced from the experimental data of BRST and PVLAS Collaborations were obtained. When two parameters are equal to each other, we arrive at Born--Infeld electrodynamics and the effect of vacuum birefringence vanishes. We find the canonical and symmetrical Belinfante energy-momentum tensors. The trace of the energy-momentum tensor is not zero and the dilatation symmetry is broken. The four-divergence of the dilatation current is equal to the trace of the Belinfante energy-momentum tensor and is proportional to the parameter (with the dimension of the field strength) of the model. The dual symmetry is also broken in the model considered.

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