Quantum mechanics versus equivalence principle

• Autor(a) principal: Accioly, Antonio [UNESP]
• Data de Publicação: 2008
• Outros Autores: Paszko, Ricardo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1103/PhysRevD.78.064002; http://hdl.handle.net/11449/225265

We consider the scattering of a photon by a weak gravitational field, treated as an external field, up to second order of the perturbation expansion. The resulting cross section is energy dependent which indicates a violation of Galileo's equivalence principle (universality of free fall) and, consequently, of the classical equivalence principle. The deflection angle θ for a photon passing by the sun is evaluated afterward and the likelihood of detecting ΔθθE≡θ-θEθE (where θE is the value predicted by Einstein's geometrical theory for the light bending) in the foreseeable future, is discussed. © 2008 The American Physical Society.