Matches in SemOpenAlex for { <https://semopenalex.org/work/W2168575906> ?p ?o ?g. }
- W2168575906 abstract "It is sometimes argued that observation of tensor modes from inflation would provide the first evidence for quantum gravity. However, in the usual inflationary formalism, also the scalar modes involve quantised metric perturbations. We consider the issue in a semiclassical setup in which only matter is quantised, and spacetime is classical. We assume that the state collapses on a spacelike hypersurface, and find that the spectrum of scalar perturbations depends on the hypersurface. For reasonable choices, we can recover the usual inflationary predictions for scalar perturbations in minimally coupled single-field models. In models where non-minimal coupling to gravity is important and the field value is sub-Planckian, we do not get a nearly scale-invariant spectrum of scalar perturbations. As gravitational waves are only produced at second order, the tensor-to-scalar ratio is negligible. We conclude that detection of inflationary gravitational waves would indeed be needed to have observational evidence of quantisation of gravity." @default.
- W2168575906 created "2016-06-24" @default.
- W2168575906 creator A5047730756 @default.
- W2168575906 creator A5078400693 @default.
- W2168575906 creator A5090219201 @default.
- W2168575906 date "2015-04-30" @default.
- W2168575906 modified "2023-09-27" @default.
- W2168575906 title "Inflation without quantum gravity" @default.
- W2168575906 cites W1519692147 @default.
- W2168575906 cites W1576186886 @default.
- W2168575906 cites W1593532664 @default.
- W2168575906 cites W1964777539 @default.
- W2168575906 cites W1970384681 @default.
- W2168575906 cites W1971230011 @default.
- W2168575906 cites W1973861971 @default.
- W2168575906 cites W1977357671 @default.
- W2168575906 cites W1978898368 @default.
- W2168575906 cites W1979929277 @default.
- W2168575906 cites W1987010236 @default.
- W2168575906 cites W1989945938 @default.
- W2168575906 cites W1994421954 @default.
- W2168575906 cites W1996154294 @default.
- W2168575906 cites W2000798261 @default.
- W2168575906 cites W2003516864 @default.
- W2168575906 cites W2003982947 @default.
- W2168575906 cites W2004727448 @default.
- W2168575906 cites W2005281572 @default.
- W2168575906 cites W2005360586 @default.
- W2168575906 cites W2009719330 @default.
- W2168575906 cites W2012869970 @default.
- W2168575906 cites W2014146538 @default.
- W2168575906 cites W2014796609 @default.
- W2168575906 cites W2018182157 @default.
- W2168575906 cites W2019344671 @default.
- W2168575906 cites W2022354167 @default.
- W2168575906 cites W2025689438 @default.
- W2168575906 cites W2028151738 @default.
- W2168575906 cites W2028593065 @default.
- W2168575906 cites W2028997753 @default.
- W2168575906 cites W2030261948 @default.
- W2168575906 cites W2035784745 @default.
- W2168575906 cites W2036147023 @default.
- W2168575906 cites W2038079406 @default.
- W2168575906 cites W2039065269 @default.
- W2168575906 cites W2044629718 @default.
- W2168575906 cites W2046864749 @default.
- W2168575906 cites W2061835457 @default.
- W2168575906 cites W2067121596 @default.
- W2168575906 cites W2073939854 @default.
- W2168575906 cites W2076773993 @default.
- W2168575906 cites W2077340910 @default.
- W2168575906 cites W2088311374 @default.
- W2168575906 cites W2090082022 @default.
- W2168575906 cites W2095283243 @default.
- W2168575906 cites W2099008464 @default.
- W2168575906 cites W2103729073 @default.
- W2168575906 cites W2104656181 @default.
- W2168575906 cites W2106111336 @default.
- W2168575906 cites W2109213529 @default.
- W2168575906 cites W2114196265 @default.
- W2168575906 cites W2115754103 @default.
- W2168575906 cites W2116232075 @default.
- W2168575906 cites W2118084428 @default.
- W2168575906 cites W2118308542 @default.
- W2168575906 cites W2118798786 @default.
- W2168575906 cites W2121854864 @default.
- W2168575906 cites W2128149447 @default.
- W2168575906 cites W2131249658 @default.
- W2168575906 cites W2132845056 @default.
- W2168575906 cites W2134251287 @default.
- W2168575906 cites W2140209214 @default.
- W2168575906 cites W2145169159 @default.
- W2168575906 cites W2146178416 @default.
- W2168575906 cites W2155678178 @default.
- W2168575906 cites W2156804507 @default.
- W2168575906 cites W2160053001 @default.
- W2168575906 cites W2164459358 @default.
- W2168575906 cites W2164564549 @default.
- W2168575906 cites W2170609994 @default.
- W2168575906 cites W2179476145 @default.
- W2168575906 cites W2963347323 @default.
- W2168575906 cites W3015407619 @default.
- W2168575906 cites W3099784054 @default.
- W2168575906 cites W3100004924 @default.
- W2168575906 cites W3100109598 @default.
- W2168575906 cites W3101522825 @default.
- W2168575906 cites W3101590591 @default.
- W2168575906 cites W3102080232 @default.
- W2168575906 cites W3104038198 @default.
- W2168575906 cites W3104659679 @default.
- W2168575906 cites W3105029811 @default.
- W2168575906 cites W3105150202 @default.
- W2168575906 cites W3105354890 @default.
- W2168575906 cites W3105912180 @default.
- W2168575906 cites W3106520534 @default.
- W2168575906 cites W3122220680 @default.
- W2168575906 cites W3122798095 @default.
- W2168575906 cites W3138841107 @default.
- W2168575906 cites W4234779674 @default.
- W2168575906 doi "https://doi.org/10.1103/physrevd.91.084064" @default.