cálculos em latex da demonstração da métrica de Schwarzschild

\section{Emergence of the Schwarzschild Metric from the Processing Field}

\subsection{1. Field Postulate}

We postulate that the processing-density field $\Phi$ obeys a Poisson-like equation:

\[
\nabla^2 \Phi = -4\pi G \beta T_{00}
\]

where:

\begin{itemize}
\item $G$ = gravitational constant;
\item $T_{00}$ = energy density;
\item $\beta$ = coupling constant;
\item $\Phi$ = accessible processing density.
\end{itemize}

\subsection{2. Vacuum Region Outside the Mass}

Outside the gravitating body:

\[
T_{00}=0
\]

thus:

\[
\nabla^2\Phi=0
\]

This is Laplace's equation.

Assuming spherical symmetry:

\[
\Phi=\Phi(r)
\]

In spherical coordinates:

\[
\nabla^2\Phi=
\frac{1}{r^2}\frac{d}{dr}\left(r^2\frac{d\Phi}{dr}\right)
\]

Therefore:

\[
\frac{1}{r^2}\frac{d}{dr}\left(r^2\frac{d\Phi}{dr}\right)=0
\]

\subsection{3. First Integration}

Multiplying both sides by $r^2$:

\[
\frac{d}{dr}\left(r^2\frac{d\Phi}{dr}\right)=0
\]

Integrating:

\[
r^2\frac{d\Phi}{dr}=C_1
\]

Thus:

\[
\frac{d\Phi}{dr}=\frac{C_1}{r^2}
\]

\subsection{4. Second Integration}

Integrating again:

\[
\Phi(r)=C_2-\frac{C_1}{r}
\]

This is the general solution.

\subsection{5. Boundary Condition}

Far from the mass:

\[
r\to\infty
\]

we require:

\[
\Phi(r)\to\Phi_0
\]

Thus:

\[
C_2=\Phi_0
\]

Therefore:

\[
\Phi(r)=\Phi_0-\frac{C_1}{r}
\]

\subsection{6. Fixing $C_1$ from the Newtonian Limit}

We require consistency with the weak-field metric:

\[
g_{00}\approx1+\frac{2\varphi_N}{c^2}
\]

where the Newtonian potential is:

\[
\varphi_N=-\frac{GM}{r}
\]

We postulate the metric relation:

\[
g_{00}=\left(\frac{\Phi}{\Phi_0}\right)^2
\]

Substituting:

\[
g_{00}=
\left(1-\frac{C_1}{\Phi_0 r}\right)^2
\]

Expanding for weak fields:

\[
g_{00}\approx1-\frac{2C_1}{\Phi_0 r}
\]

Comparing with Schwarzschild weak-field form:

\[
1-\frac{2GM}{rc^2}
\]

we obtain:

\[
C_1=\Phi_0\frac{GM}{c^2}
\]

\subsection{7. Final Result}

Thus:

\[
\Phi(r)=\Phi_0\left(1-\frac{GM}{rc^2}\right)
\]

and therefore:

\[
g_{00}=
\left(1-\frac{GM}{rc^2}\right)^2
\]

For weak fields:

\[
g_{00}\approx1-\frac{2GM}{rc^2}
\]

which reproduces the temporal Schwarzschild component.

\subsection{Conclusion}

The accessible processing-density field naturally produces gravitational time dilation in the weak-field limit.

The next step is deriving the radial component:

\[
g_{rr}
\]

to recover the full Schwarzschild metric.

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