caa a22 4500 467887977 CHVBK 20180406152740.0 cr unu---uuuuu 170328e20061101xx s 000 0 eng 10.1007/s10714-006-0336-8 doi (NATIONALLICENCE)springer-10.1007/s10714-006-0336-8 Hoyle Charles CENPA Laboratory, University of Washington, Campus Box 354290, 98195-4290, Seattle, WA, USA aut The "dark side” of gravitational experiments [Elektronische Daten] [Charles Hoyle] Theoretical speculations about the quantum nature of the gravitational interaction have motivated many recent experiments. But perhaps the most profound and puzzling questions that these investigations address surround the observed cosmic acceleration, or Dark Energy. This mysterious substance comprises roughly two-thirds of the energy density of the universe. Current gravitational experiments may soon have the sensitivity to detect subtle clues that will reveal the mechanism behind the cosmic acceleration. On the laboratory scale, short-range tests of the Newtonian inverse-square law (ISL) provide the most sensitive measurements of gravity at the Dark Energy length scale, $$\lambda _{\rm d} = (\hbar\hbox{c}/\rho_{\rm d})^{1/4}\approx 85 {\mu\hbox{m}},$$ where $$\rho_{\rm d} \approx 3.8 \hbox{keV/cm}^{3}$$ is the observed Dark Energy density. This length scale may also have fundamental significance that could be related to the "size” of the graviton. At the University of Washington, we are conducting the world's most sensitive, short-range test of the Newtonian ISL. Springer Science+Business Media, LLC, 2006 General Relativity and Gravitation Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 38/11(2006-11-01), 1553-1558 0001-7701 38:11<1553 2006 38 10714 https://doi.org/10.1007/s10714-006-0336-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10714-006-0336-8 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hoyle Charles CENPA Laboratory, University of Washington, Campus Box 354290, 98195-4290, Seattle, WA, USA aut NATIONALLICENCE 773 0- General Relativity and Gravitation Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 38/11(2006-11-01), 1553-1558 0001-7701 38:11<1553 2006 38 10714 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer