With a title like this, it would be a sin to not put this research on the time travel list.
The paper describes an experiment by Australian Professor Timothy Ralph and his student
Martin Ringbauer (plus the additional authors that seem to be required for any paper in
experimental physics). The starting point of the research is David Deutsch’s proposition
that the probabilistic quantum behavior of nature can overcome certain kinds of cause and
effect violations that seem inherent in closed timelike curves (i.e., time travel!) that are
allowed by general relativity. The Australians don’t actually create a time travel
situation, but instead they used entangled photons to simulate how Deutsch’s original
particle and from-the-future particle would interact.
One aspect of general relativity that has long intrigued physicists is the relative ease
with which one can find solutions to Einstein’s field equations that contain closed
timelike curves (CTCs)`-causal loops in space-time that return to the same point in space
and time.
DEBUT
Experimental Simulation of Closed Timelike Curves, in Nature
Communications,19 June 2014 (e-journal).
VARIANTS
Debut. Experimental Simulation of Closed Timelike Curves, in Nature Communications,19 June 2014 (e-journal).
One aspect of general relativity that has long intrigued physicists is the relative ease
with which one can find solutions to Einstein’s field equations that contain closed
timelike curves (CTCs)`-causal loops in space-time that return to the same point in space
and time.
1 English variant