Spin-spacetime EPR Gedanken-Experiment

General relativity and various quantum gravity theories predict that the intrinsic quantum spin should bend the spacetime around it, breaking its spherical symmetry. The Spin-spacetime EPR Gedanken-Experiment is a thought experiment to prove that such a spin-related deviation from spherical symmetry would violate relativistic causality. To avoid a paradox, the measurable spacetime (which is associated with quantum spin) has to be spherically symmetric. and thus thought experiment approaches are suggested as a testing tool for these theories.
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The spin-spacetime EPR Gedanken-Experiment can be used as a theoretical test for various quantum gravity theories - all of these theories should maintain relativistic causality. Thus, the Gedanken-Experiment restricts and could lead to modification of these theories.<ref name"SSC" /><ref name"SSC2" /> To avoid a paradox, the measurable spacetime (which is associated with quantum spin) has to be spherically symmetric.<ref name"SSC" /><ref name"SSC2" />

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