Coupling to the curvature for a scalar field from the equivalence principle
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Abstract: (IOP)
By applying the equivalence principle to the propagation of scalar waves in a curved spacetime, the value 1/6 for the coupling constant between the field and the Ricci scalar is derived. No coupling to higher-order scalars constructed from the Riemann tensor is allowed.- field theory: scalar
- relativity theory: equivalence principle
- propagator
- coupling: conformal
- conformal: coupling
- coupling: minimal
- minimal: coupling
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