Measurement induced entanglement entropy of gravitational wave detections

Research on the projective measurement of gravitons increasingly supports Dyson's conclusions that the detection of a graviton is not physically possible. It is therefore prudent to consider alternative signatures of non-classicality in gravitational wave detections to determine if gravity is quantized. Coincident multiple detector operations make it possible to consider the bipartite measurement induced entanglement, in the detection process, as a signature of non-classicality. By developing a model of measurement induced entanglement, based on a fixed number of gravitons for the bipartite system, we demonstrate that the entanglement entropy is on the order of a few percent of the effective number of gravitons interacting with the detectors. The bipartite measurement induces entanglement as part of the detection process and avoids the problems associated with extremely low detector efficiencies in identifying signatures of non-classicality.