Quantum signatures in nonlinear gravitational waves

• URL: http://arxiv.org/abs/2111.01779v4
• Date: Wed, 14 Dec 2022 23:52:31 GMT
• Title: Quantum signatures in nonlinear gravitational waves
• Authors: Thiago Guerreiro, Francesco Coradeschi, Antonia Micol Frassino, Jennifer Rittenhouse West, Enrico Junior Schioppa
• Abstract summary: We investigate quantum signatures in gravitational waves using tools from quantum optics. We show that Squeezed-coherent gravitational waves can enhance or suppress the signal measured by an interferometer. We also show that Gaussian gravitational wave quantum states can be reconstructed from measurements over an ensemble of optical fields interacting with a single copy of the gravitational wave.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The effective quantum field theory description of gravity, despite its non-renormalizability, allows for predictions beyond classical general relativity. As we enter the age of gravitational wave astronomy, an important and timely question is whether measurable quantum predictions that depart from classical gravity, analogous to quantum optics effects which cannot be explained by classical electrodynamics, can be found. In this work, we investigate quantum signatures in gravitational waves using tools from quantum optics. Squeezed-coherent gravitational waves, which can exhibit sub-Poissonian graviton statistics, can enhance or suppress the signal measured by an interferometer, a characteristic effect of quantum squeezing. Moreover, we show that Gaussian gravitational wave quantum states can be reconstructed from measurements over an ensemble of optical fields interacting with a single copy of the gravitational wave, thus opening the possibility of detecting quantum features of gravity beyond classical general relativity.

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