8 July 2008, JellyBean @ 3:49 am

Time TravelA new concept of time travel has scientists interested. Theoretical physicist Amos Ori at the Technion-Israel Institute of Technology in Haifa has been working on a groundbreaking new idea on the principles and mechanics of time travel.

Previous scientists looked to gravity to bend space and time but many dismissed it as impossible due to the need of an exotic form of matter with so-called “negative energy density.” Although this matter may exist, scientists concluded that it was in such small amounts that you could never get enough of it.

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Ori’s research found that you do not need this matter to bend time and space and therefore he has eliminated a barrier of time travel.

It all starts with a donut-shaped hole enveloped within a sphere of normal matter.

“We’re talking about these closed loops of time, and the simplest kind of closed loops are circles, which is why we have this ring-shaped hole,” Ori explained on the Live Science Web site.

“The machine is space-time itself,” Ori said. “If we were to create an area with a warp like this in space that would enable time lines to close on themselves, it might enable future generations to return to visit our time.” He added however – “it can’t be used to travel to a time before the time machine was constructed.”

His new concepts were recently published in the Aug 3 issue of the Physical Review D journal.

Theoretical physicist Ken Olum of Tufts University in Medford, Mass., who did not participate in this study, was skeptical of the new model. He said that it sidestepped prior theoretical objections to time travel.

Live Science: Time Travel Machine Outlined
USA Today: Physicist throws time-travel theories a curve

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