Graduate Kerr Metric: Removing Singularity via Coordinate Transformation

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The discussion centers on whether the singularity of the Kerr metric can be removed through a coordinate transformation, similar to the Schwarzschild metric's transformation to Kruskal-Szekeres coordinates. Participants explore the potential existence of a specific coordinate system that could achieve this for the Kerr metric. The conversation highlights the complexities involved in applying coordinate transformations to rotating black holes. Key terms and concepts related to the Kerr metric and singularities are examined. The thread ultimately seeks to clarify the applicability of these transformations in the context of general relativity.
Arman777
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We know that, the singularity of the Schwarzschild metric at ##r = 2M## can be removable via coordinate transformation to Kruskal-Szekers . Can we apply a similar argument to the Kerr metric? If so, what's the name of this coordinate system?
 
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In an inertial frame of reference (IFR), there are two fixed points, A and B, which share an entangled state $$ \frac{1}{\sqrt{2}}(|0>_A|1>_B+|1>_A|0>_B) $$ At point A, a measurement is made. The state then collapses to $$ |a>_A|b>_B, \{a,b\}=\{0,1\} $$ We assume that A has the state ##|a>_A## and B has ##|b>_B## simultaneously, i.e., when their synchronized clocks both read time T However, in other inertial frames, due to the relativity of simultaneity, the moment when B has ##|b>_B##...
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