Using cosmology to establish the quantization of gravity

While many aspects of general relativity have been tested, and general principles of quantum dynamics demand its quantization, there is no direct evidence for that. It has been argued that development of detectors sensitive to individual gravitons is unlikely, and perhaps impossible. We argue here,...

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Bibliographic Details
Published in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2014-02, Vol.89 (4), Article 047501
Main Authors: Krauss, Lawrence M., Wilczek, Frank
Format: Article
Language:English
Subjects:
Cosmic microwave background
Cosmology
Gravitation
Gravitons
Inflation
Quantization
Relativity
Universe
Wavelengths
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Summary:While many aspects of general relativity have been tested, and general principles of quantum dynamics demand its quantization, there is no direct evidence for that. It has been argued that development of detectors sensitive to individual gravitons is unlikely, and perhaps impossible. We argue here, however, that measurement of polarization of the cosmic microwave background due to a long wavelength stochastic background of gravitational waves from inflation in the early Universe would firmly establish the quantization of gravity.
ISSN:1550-7998
1550-2368
DOI:10.1103/PhysRevD.89.047501