Growing Block Universe: SR & GR Compatibility

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The Growing Block Universe theory suggests a single "true" definition of simultaneity, raising questions about its compatibility with Special Relativity (SR) and General Relativity (GR). For compatibility, it must be viewed as a metaphysical claim, meaning no physical experiment can definitively establish what the "true" simultaneity is. This perspective challenges the relativistic notions of time and simultaneity inherent in SR and GR. The discussion highlights the tension between metaphysical assertions and empirical science in understanding the nature of time. Ultimately, the compatibility of the Growing Block Universe with SR and GR hinges on its interpretation as a non-empirical concept.
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Is the Growing Block Universe theory compatible with SR an GR?
 
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Growing block universe implies a single "true" definition of simultaneity, so this would only be compatible with SR and GR if you treat it as a purely metaphysical claim and agree that absolutely no physical experiment could determine what the metaphysically "true" definition of simultaneity actually was.
 

Thread 'EPR revisited'

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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