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The Schwarzschild metric: It's the coordinates, stupid!

Abstract

Every general relativity textbook emphasizes that coordinates have no physical meaning. Nevertheless, a coordinate choice must be made in order to carry out real calculations, and that choice can make the difference between a calculation that is simple and one that is a mess. We give a concrete illustration of the maxim that "coordinates matter" using the exact Schwarzschild solution for a vacuum, static spherical spacetime. We review the standard textbook derivation, Schwarzschild's original 1916 derivation, and a derivation using the Landau-Lifshitz formulation of the Einstein field equations. The last derivation is much more complicated, has one aspect for which we have been unable to find a solution, and gives an explicit illustration of the fact that the Schwarzschild geometry can be described in infinitely many coordinate systems.


Publication:
American Journal of Physics
Pub Date:
April 2014
DOI:

10.1119/1.4850396

10.48550/arXiv.1308.0394

arXiv:
arXiv:1308.0394
Bibcode:
2014AmJPh..82..295F
Keywords:
  • General Relativity and Quantum Cosmology
E-Print:
15 pages, to be submitted to the American Journal of Physics
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