AT1 - Alternative Theories (A) |
Speaker_ |
Woodard, Richard |
Talk _ |
Local versus Nonlocal Metric Modifications of Gravity |
Abstract _ |
I review the classic result of Ostrogradskii which excludes all but a tiny subset of local, metric-based modifications of gravity. I then argue that the range of possible modifications becomes vastly larger and more interesting if one abandons locality. I also show how this can be done consistent with causality. This talk is based upon astro-ph/0601672. |