The paper discusses the potential of using cosmological observations, specifically the polarization of the Cosmic Microwave Background (CMB) due to gravitational waves from the inflationary period of the early universe, to establish the quantization of gravity. It argues that while direct detection of individual gravitons is unlikely, the measurement of a gravitational wave background could provide evidence for quantum effects in gravity. The paper emphasizes that such a background has not yet been observed but outlines the theoretical basis and potential for future detection.
documents/EFTA00316650.pdf
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