期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 10, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2019/10/012
关键词
gravitational waves / theory; modified gravity; quantum gravity phenomenology
资金
- Spanish Ministry of Science, Innovation and Universities [FIS2017-86497-C2-2-P]
- JSPS KAKENHI [17K14282]
- Career Development Project for Researchers of Allied Universities
- Science and Technology Facility Council (STFC), United Kingdom [ST/P000258/1]
- STFC grant [ST/P00055X/1]
- STFC [ST/P00055X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/P00055X/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [17K14282] Funding Source: KAKEN
We investigate possible signatures of quantum gravity which could be tested with current and future gravitational-wave (GW) observations. In particular, we analyze how quantum gravity can influence the GW luminosity distance, the time dependence of the effective Planck mass and the instrumental strain noise of interferometers. Using both model-dependent and model-independent formulae, we show that these quantities can encode a non-perturbative effect typical of all quantum-gravity theories, namely the way the dimension of spacetime changes with the probed scale. Effects associated with such dimensional flow might be tested with GW observations and constrained significantly in theories with a microscopically discrete spacetime geometry, more strongly than from propagation-speed constraints. Making use of public LIGO data as well as of a simulated higher-redshift LISA source, we impose the first, respectively, actual and mock constraints on quantum-gravity parameters affecting the GW luminosity distance and discuss specific theoretical examples. If also the Newtonian potential is modified but light geodesics are not, then solar-system bounds may be stronger than GW ones. Yet, for some theories GW astronomy can give unique information not available from solar-system tests.
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