The metric is reinterpreted as relational information carried by local correlations with a quantum reference frame, yielding the nonlinear Einstein equation via a conditional entropy constraint with scalar curvature equal to the cosmological constant.
Relational superposition measurements with a material quantum ruler
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Recovering Einstein's equation from local correlations with quantum reference frames
The metric is reinterpreted as relational information carried by local correlations with a quantum reference frame, yielding the nonlinear Einstein equation via a conditional entropy constraint with scalar curvature equal to the cosmological constant.