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Teorias Semiclássica e Efetiva da Gravitação
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Introduction to Quantum Gravity
In this talk, we give a glimpse of the problems with quantum gravity and some possible solutions.
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Photon mass and gravitational deflection
The deflection of a massive photon by an external gravitational field is energy-dependent. Interesting enough, any massive quantum particle, no matter what its spin is, undergoes dispersive deflection in external gravitational fields. Exploiting the dispersive deflection of the quantized massive electromagnetic radiation by the gravitational field of the Sun, we find an upper bound for the photon mass.
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Conflict between the classical equivalence principle and quantum mechanics
Group of Field Theory from First Principles Centro Brasileiro de Pesquisas Fisicas CBPF, Rua Dr. Xavier Sigaud 150, 22290-180 Rio de Janeiro, RJ