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arXiv 2012.07352gr-qchep-th
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一个与Wahlquist度规耦合的无质量标量粒子

A massless scalar particle coupled to the Wahlquist metric

T. Birkandan, M. Hortacsu

摘要:

本文研究了无质量标量场与Wahlquist度规耦合的波动方程的解,即D型解。我们首先取完整的度量,然后通过取度量中的一些常数null来简化度量。当我们不使度量中的任意常数等于零时,我们发现解是根据一般Heun函数给出的,除了一些简单的函数乘以这个解。如果我们将常数$Q_0$或$a_1$中的一个等于零,这也是正确的。当NUT相关常数$a_1$和$Q_0$都为零时,单汇合Heun函数是解。当我们也使常数$ν_0$等于零时,我们得到了双汇合Heun型解。在后两种情况下,我们有一个指数和两个单项式提高到幂乘以Heun型函数。因此,我们推广了Batic等人。D型度量的结果,并表明Wahlquist度量的所有变化给出Heun型解。

英文摘要:

We study the solutions of the wave equation where a massless scalar field is coupled to the Wahlquist metric, a type-D solution. We first take the full metric and then write simplifications of the metric by taking some of the constants in the metric null. When we do not equate any of the arbitrary constants in the metric to zero, we find the solution is given in terms of the general Heun function, apart from some simple functions multiplying this solution. This is also true, if we equate one of the constants $Q_0$ or $a_1$ to zero. When both the NUT-related constant $a_1$ and $Q_0$ are zero, the singly confluent Heun function is the solution. When we also equate the constant $ν_0$ to zero, we get the double confluent Heun-type solution. In the latter two cases, we have an exponential and two monomials raised to powers multiplying the Heun type function. Thus, we generalize the Batic et al. result for type-D metrics for this metric and show that all variations of the Wahlquist metric give Heun type solutions.

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