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arXiv 0801.3632math-phmath.MP
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Killing矢量场、麦克斯韦方程组与洛伦兹时空

Killing Vector Fields, Maxwell Equations and Lorentzian Spacetimes

Waldyr A. Rodrigues

摘要:

本文首先分析了洛伦兹时空中的麦克斯韦方程组的结构,其中势A正比于1-形式K,物理上等价于一个Killing矢量场(假设存在)。我们表明,这样的A服从洛伦兹规范,也可以写在协变的D 'Alembertian或Ricci算子的波动方程。此外,我们确定了由该势定义的正确电流,表明它是超导型的,是A的分量与Ricci 1型场的乘积的两倍。我们还研究了由电磁场F = dA(A,如上所述)、具有由作用函数S描述的动力学的理想带电流体和引力场组成的耦合系统所产生的时空结构。我们证明了爱因斯坦方程在这种情况下,然后等价于麦克斯韦方程组与fFAF(产品的意思是相应的形式场的Clifford产品),其中f是一个标量函数,满足一个很好地确定的代数二次方程。

英文摘要:

In this paper we first analyze the structure of Maxwell equations in a Lorentzian spacetime where the potential A is proportional to 1-form K physically equivalent to a Killing vector field (supposed to exist). We show that such A obeys the Lorenz gauge and also a wave equation that can be written in terms of the covariant D'Alembertian or the Ricci operator. Moreover, we determine the correct current defined by that potential showing that it is of superconducting type, being two times the product of the components of A by the Ricci 1-form fields. We also study the structure of the spacetime generated by the coupled system consisting of a electromagnetic field F = dA (A, as above), an ideal charged fluid with dynamics described by an action function S and the gravitational field. We show that Einstein equations in this situation is then equivalent to Maxwell equations with a current givn by fFAF (the product meaning the Clifford product of the corresponding form fields), where f is a scalar function which satisfies a well determined algebraic quadratic equation.

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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