SpECTRE  v2025.08.19
GrSelfForce::Tags::MMode Struct Reference

The complex m-mode field \((\Psi_m)_{ab}\). More...

#include <Tags.hpp>

Public Types

using type = tnsr::aa< ComplexDataVector, 3 >
 

Detailed Description

The complex m-mode field \((\Psi_m)_{ab}\).

Defined by the m-mode decomposition of the metric perturbation \(h_{ab}\):

\begin{equation} \bar{h}_{ab}(t,r,\theta,\phi) = \sum_{m=-\infty}^{\infty} \bar{h}^m_{ab}(r,\theta) e^{im(\phi - \Omega t)} \end{equation}

and further decomposition with convenient prefactors:

\begin{align*} &(\Psi_m)_{tt} = r \bar{h}^m_{tt} \\ &(\Psi_m)_{tr} = \frac{\Delta}{r} \bar{h}^m_{tr} \\ &(\Psi_m)_{t\theta} = \bar{h}^m_{t\theta} \\ &(\Psi_m)_{t\phi} = \frac{1}{\sin\theta} \bar{h}^m_{t\phi} \\ &(\Psi_m)_{rr} = \frac{\Delta^2}{r^3} \bar{h}^m_{rr} \\ &(\Psi_m)_{r\theta} = \frac{\Delta}{r^2} \bar{h}^m_{r\theta} \\ &(\Psi_m)_{r\phi} = \frac{\Delta}{r^2\sin\theta} \bar{h}^m_{r\phi} \\ &(\Psi_m)_{\theta\theta} = \frac{1}{r} \bar{h}^m_{\theta\theta} \\ &(\Psi_m)_{\theta\phi} = \frac{1}{r\sin\theta} \bar{h}^m_{\theta\phi} \\ &(\Psi_m)_{\phi\phi} = \frac{1}{r\sin^2\theta} \bar{h}^m_{\phi\phi} \\ \end{align*}


The documentation for this struct was generated from the following file: