(a) A closed timelike curve, in which p2 is a chronology-respecting system, and p1 is a time-traveling system that can jump from point tA to the past point tB through a spacetime wormhole, has the ability to interact with itself […] ↓ Read the rest of this entry…
Eris eyes up its next victim (Image: Nasa/SPL) Dwarf planet Eris may reveal quantum gravity 24 January 2013 by Ker Than KILLING Pluto was only the beginning. The dwarf planet Eris, named for the Greek goddess of strife, could also […] ↓ Read the rest of this entry…
The AURIGA gravitational wave detector consists of a 3-meter aluminum cylinder, cooled to a few millionths of a degree above absolute zero. The bar is kept carefully isolated from other vibrations, to help measure tiny gravitational disturbances – or possibly […] ↓ Read the rest of this entry…
A simple experiment could reveal quantum foam. (Courtesy: iStockphoto/Vladimir Vladimirov) Table-top test targets quantum foam Nov 29, 2012 One of the biggest challenges in physics – finding evidence for quantum gravity – could be tackled using a simple table-top experiment, […] ↓ Read the rest of this entry…
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