MG11 |
Participant |
Potting, Robertus | |
|
Institution |
CENTRA, Departamento de Física, FCT, Universidade do Algarve - Campus de Gambelas - Faro - - PORTUGAL | |
|
Session |
Talk |
Abstract |
|
AT1 |
Spontaneous Lorentz breaking, Nambu-Goldstone modes, and gravity |
In general relativity, masslessness of gravitons can be traced to symmetry under diffeomorphisms. However, another elegant possibility exists: masslessness can instead arise from spontaneous violation of local Lorentz invariance. We construct the corresponding theory of gravity. It reproduces the Einstein-Hilbert action of general relativity at low energies and temperatures. We discuss its merits and implications. |