Graduate Do state variables in general relativity have analogies in electromagnetism?

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General relativity does not have state variables that directly correspond to those in electromagnetism, such as current, charge, voltage, and flux. The discussion highlights that none of these variables appear in Maxwell's Equations, which serve as the electromagnetic counterpart to the Einstein Field Equations in general relativity. This suggests a fundamental difference in how the two theories describe their respective phenomena. The absence of analogous state variables indicates that the frameworks of general relativity and electromagnetism operate under different principles. Therefore, the conclusion is that general relativity lacks state variables similar to those in electromagnetism.
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Hi, does general relativity have state variables, analogous to current (I), charge (Q), voltage (V), and flux (Φ) in electromagnetism? Thanks.
 
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cuallito said:
does general relativity have state variables, analogous to current (I), charge (Q), voltage (V), and flux (Φ) in electromagnetism?

None of the variables you give for electromagnetism appear in Maxwell's Equations, which are the EM analogue to the Einstein Field Equation of GR, so that would seem to mean the answer is no.
 

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