Reversing the flow of time on a quantum computer

Researchers have developed an algorithm to simulate returning a particle briefly to the past. The results suggest new paths for exploring the backward flow of time in quantum systems.

US researcher uses math to investigate possibility of time travel

Ben Tippett, a mathematics and physics instructor has created a formula that describes a method for time travel. " We tend to think it's not possible because we don't actually do it," says Tippett. "But, mathematically, it is possible."

Time travel into the future is already possible

The hydrogen ions travel at 99.999,999,1 per cent of the speed of light. Their time slows down by a factor of 27,777,778. One second for one of these protons is about 11 months for us.

Physicists just confirmed a pear-shaped nucleus, and it could ruin time travel forever

Physicists have confirmed the existence of a new form of atomic nuclei, and the fact that it's not symmetrical challenges the fundamental theories of physics that explain our Universe.

Wormholes Might Burrow Through Black Hole Cores

Remove the singularity and a wormhole appears in the center of a black hole -- but is it traversable?

Five ways to travel through time

Travel to the past is probably impossible. But the future is a different story.

Scientists Admit Time Travel May Now Be More Possible Than Ever

For some, the idea of realistically achieving the ability to travel through time is a thankless pipe dream. For others, each passing day is but another 24-hour block of dreaming about how to best alter history once the surely inevitable technology comes along to make time travel as easy as swiping a bus pass.

Computing with time travel?

Why send a message back in time, but lock it so that no one can ever read the contents? Because it may be the key to solving currently intractable problems.

Time travel experiment demonstrates how to avoid the grandfather paradox

( -- Among the many intriguing concepts in Einstein’s relativity theories is the idea of closed timelike curves (CTCs), which are paths in spacetime that return to their starting points. As such, CTCs offer the possibility of traveling back in time. But, as many science fiction films have addressed, time travel is full of potential paradoxes. Perhaps the most notable of these is the grandfather paradox, in which a time traveler goes back in time and kills her grandfather, preventing her own birth.

DNA engine observed in real-time traveling along base pair track

In a complex feat of nanoengineering, a team of scientists at Kyoto University and the University of Oxford have succeeded in creating a programable molecular transport system, the workings of which can be observed in real time. The results, appearing in the latest issue of Nature Nanotechnology, open the door to the development of advanced drug delivery methods and molecular manufacturing systems.

Big Bang simulated in metamaterial shows time travel is impossible

( -- By observing the way that light moves inside a metamaterial, researchers have reconstructed how spacetime has expanded since the Big Bang. The results provide a better understanding of why time moves in only one direction, and also suggest that time travel is impossible.