Using arguments based on fundamental principles, Freeman Dyson concluded that the individual measurement of the graviton is physically impossible. Considerable research has been dedicated to find the graviton through single-point detections, all of which supports Dyson's conclusion. The community of gravitational physicists still search for the graviton through means of single-point detections; however, there is a much greater possibility of successfully finding the graviton through bipartite detections. Our research follows up on the paper "Measurement-induced entanglement entropy of gravitational wave" by Preston Jones, Quentin G. Bailey, Andri Gretarsson, and Edward Poon in Physics Letters B and explores other possible methods of finding signatures of non-classicality in gravitational waves. The calculations performed to produce their Figure 2 are updated from Mathcad to Python to be more readily available for use in other measures of non-classicality. Bipartite detections allow for the observation of the measurement-induced entanglement entropy, which is a signature of non-classicality in gravitational waves. Bunching is another potential signature of non-classicality that can easily be observed in bosons with bipartite detections through Hanbury-Brown and Twiss experiments but is complicated by the optical equivalence theorem. However, bipartite detections also present the opportunity to observe anti-bunching, a purely quantum mechanical effect, which would prove that gravity is quantized. Bipartite detections are very likely the key to find the smoking gun for the quantization of gravity.
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Signatures of non-classicality in gravitational waves through bipartite detections
Published:
27 February 2026
by MDPI
in The 3rd International Online Conference on Universe
session Quantum Gravity and Field Theory
Abstract:
Keywords: gravitational waves; bipartite detections; bunching ; non-classicality; entanglement entropy
