MG12 - Talk detail |
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Participant |
Potting, Robertus | |
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Institution |
CENTRA, IST, Lisbon, Portugal, NIF: 501507930 and Dept. de Física, Universidade do Algarve, Faro - Campus de Gambelas - Faro - - Portugal | |
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Session |
Talk |
Abstract |
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MGAT8 |
Lorentz violation and gravity |
A model of gravity is presented based on spontaneous Lorentz symmetry breaking. The gravitons in this model arise as the Nambu-Goldstone (NG) bosons of the spontaneously broken symmetries. The Lagrangian is highly constrained by the application of a bootstrap procedure based on the principle of consistent coupling to the total energy energy-momentum tensor. It is shown that, at low energy, the resulting lagrangian for the NG modes is equivalent to General Relativity in a fixed gauge. We discuss some issues related to quantization. |