Metric Tensor of the Reissner–Nordström Metric

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Discussion Overview

The discussion centers on the Metric Tensor of the Reissner–Nordström Metric, including requests for derivations and resources. Participants explore methods of deriving the metric tensor, comparing it to the Schwarzschild solution, and discussing the challenges involved in the derivation process.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant requests the Metric Tensor of the Reissner–Nordström Metric and expresses difficulty finding derivations online.
  • Another participant suggests that deriving the metric tensor is straightforward for those familiar with the Schwarzschild solution and mentions the need to solve Maxwell equations alongside the electrovacuum field equations.
  • A different participant notes that deriving the solution can also be done in a coordinate-free manner, which they find more insightful, although it is more challenging.
  • One participant admits to not having seen the Reissner–Nordström Metric Tensor derived from its metric and asks for resources that simplify the derivation process.
  • Another participant provides links to resources that include derivations of the Reissner–Nordström metric and suggests using the Harrison transformation to derive it from the Schwarzschild metric.

Areas of Agreement / Disagreement

Participants express varying levels of familiarity with the derivation process, and while some suggest methods and resources, there is no consensus on the best approach or a definitive source for the derivation.

Contextual Notes

Some participants highlight the complexity of deriving the Reissner–Nordström Metric Tensor, especially in relation to the Schwarzschild solution, indicating that assumptions about prior knowledge may affect the discussion.

Philosophaie
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I am looking for the Metric Tensor of the Reissner–Nordström Metric.g_{μv}
I have searched the web: Wiki and Bing but I can not find the metric tensor derivations.

Thanks in advance!
 
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As far as deriving it goes, you can do this easily yourself if you've seen the standard derivation of the Schwarzschild solution before. The only extra thing you would have to do is solve the source-free Maxwell equations ##\nabla_{[\gamma}F_{\mu\nu]} = 0## and ##\nabla^{\mu} F_{\mu\nu} = 0## simultaneously with the electrovacuum field equations ##G_{\mu\nu} = 8\pi T^{EM}_{\mu\nu}## but because we are dealing with a spherically symmetric static source, you can easily deduce ##F_{\mu\nu}## by working in the coordinates adapted to all the symmetries of the space-time and then solve ##G_{\mu\nu} = 8\pi T^{EM}_{\mu\nu}## in said coordinates.

Alternatively, you can derive the solution without using coordinates at all; you would be doing all of your calculations (right before you write down the actual solution) in a coordinate-free manner. This is harder but in my opinion much more insightful than just going through the mindless coordinate computations.
 
Last edited:
WannabeNewton said:
As far as deriving it goes, you can do this easily yourself if you've seen the standard derivation of the Schwarzschild solution before.

Alternatively, you can derive the solution without using coordinates at all; you would be doing all of your calculations (right before you write down the actual solution) in a coordinate-free manner. This is harder but in my opinion much more insightful than just going through the mindless coordinate computations.

I have never seen the Reissner–Nordström Metric Tensor derived before from its metric. The Schwarzschild Metric Tensor is difficult enough.

Is there any websites that go thru the and simplifies the derivation of either of these Non-rotating Charged or Uncharged Metric Tensor Components from its Metric?
 
Oops, sorry. I didn't notice that you wanted a derivation, not just the metric itself.
 
Philosophaie said:
I have searched the web: Wiki and Bing but I can not find the metric tensor derivations.
Google "Reissner-Nordstrom derivation" immediately turns up several, including:

http://gmammado.mysite.syr.edu/notes/RN_Metric.pdf
http://arxiv.org/pdf/physics/0702014.pdf

Actually the easiest way to obtain the Reissner-Nordstrom metric is not to start from scratch, but to derive it from Schwarzschild using the Harrison transformation.
 

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