Image: Prototype atom interferometer
Nov 29, 2017
A prototype atom interferometer chip in a vacuum chamber, harnessing the quantum behaviour of atoms to perform ultra-precise measurements of gravity.
Physicists propose test of quantum gravity using current technology
Oct 27, 2017 feature
Physicists have proposed a way to test quantum gravity that, in principle, could be performed by a laser-based, table-top experiment using currently available technology. Although a theory of quantum gravity would overcome ...
Hints of extra dimensions in gravitational waves?
Jun 28, 2017
Researchers from the Max Planck Institute for Gravitational Physics (Albert Einstein Institute/AEI) in Potsdam found that hidden dimensions – as predicted by string theory – could influence gravitational waves. In a recently ...
'Saddle-shaped' universe could undermine general relativity
May 22, 2017
Researchers have shown how singularities – which are normally only found at the centre of black holes and hidden from view – could exist in highly curved three-dimensional space.
Cosmologists a step closer to understanding quantum gravity
Jan 23, 2017
Cosmologists trying to understand how to unite the two pillars of modern science – quantum physics and gravity – have found a new way to make robust predictions about the effect of quantum fluctuations on primordial density ...
Loop quantum gravity theory offers glimpse beyond the event horizon
May 27, 2016
In principle, nothing that enters a black hole can leave the black hole. This has considerably complicated the study of these mysterious bodies, which generations of physicists have debated since 1916, when their existence ...
Deep space experiment could measure the gravitational constant with nearly 1,000 times improvement in accuracy (Update)
May 17, 2016 report
(Phys.org)—Scientists have proposed an experiment that could measure the value of Newton's gravitational constant, G, from deep space instead of an Earth-based laboratory. The researchers predict that the deep space experiment ...
The universe, where space-time becomes discrete
Apr 22, 2016
In quantum gravity, classical physics and quantum mechanics are at odds: scientists are still uncertain how to reconcile the quantum "granularity" of space-time at the Planck scale with the theory of special relativity. In ...
Physicists investigate the structure of time, with implications for quantum mechanics and philosophy
Feb 01, 2016 report
(Phys.org)—Although in theory it may seem possible to divide time up into infinitely tiny intervals, the smallest physically meaningful interval of time is widely considered to be the Planck time, which is approximately ...
Physicists posit quantum gravity's rainbow
Jan 15, 2016
When white light is passed through a prism, the rainbow on the other side reveals a rich palette of colors. Theorists from the faculty of physics, University of Warsaw have shown that in models of the universe using any of ...