The Path Integral, Perturbation Theory and Complex Actions

• Gravitational waves have yet to be directly
observed.
• There is indirect evidence of the loss of energy
from gravitational radiation.
• We propose a simple experimental scheme
which could be used to detect the speed of
propagation of gravitational disturbances.
• If a small fluctuation/movement is made by a
gravitating body, the effect is felt at a detector
after a time delay equal to the gravitational
speed travel time from the body to the detector.
• We can expect that it is the same as the speed
of light.
Tuesday, 2 April, 13