Mit Time Travel Research

New York Post, Science and Technology

August 25, 2010

Black holes, wormholes, and cosmic strings — each of these phenomena has been proposed as a method for time travel, but none seem feasible, for (at least) one major reason. Although theoretically they could distort space-time, they all require an unthinkably gigantic amount of mass.

Ronald Mallett, a former University of Connecticut Physics Professor, now employed at the Massachusetts Institute of Technology, considered an alternative to these time travel methods based on Einstein's famous relativity equation: E=mc2.

"Einstein showed that mass and energy are the same thing," said Mallett, who published his first research on time travel in 2000 in Physics Letters. "The time machine we've designed uses light in the form of circulating lasers to warp or loop time instead of using massive objects."

To determine if time loops exist, Mallett is designing a desktop-sized device that will test his time-warping theory. By arranging mirrors, Mallett can make a circulating light beam which should warp surrounding space. Because some subatomic particles have extremely short lifetimes, Mallett hopes that he will observe these particles to exist for a longer time than expected when placed in the vicinity of the circulating light beam. A longer lifetime means that the particles must have flowed through a time loop into the future.

"Say you have a cup of coffee and a spoon," Mallett explained to us, "The coffee is empty space, and the spoon is the circulating light beam. When you stir the coffee with the spoon, the coffee — or the empty space — gets twisted. Suppose you drop a sugar cube in the coffee. If empty space were twisting, you'd be able to detect it by observing a subatomic particle moving around in the space."

And according to Einstein, whenever you do something to space, you also affect time. Twisting space causes time to be twisted, meaning you could theoretically walk through time as you walk through space.

"As physicists, our experiments deal with subatomic particles," said Mallett. "How soon humans will be able to time travel depends largely on the success of these experiments, which will take the better part of a decade. And depending on breakthroughs, technology, and funding, I believe that human time travel could happen this century."

"But what is time? That is a very, very difficult question," said Mallett. "Time is a way of separating events from each other. Even without thinking about time, we can see that things change, seasons change, people change. The fact that the world changes is an intrinsic feature of the physical world, and time is independent of whether or not we have a name for it."

"One or my former colleagues at MIT, Doctor Edward Ray, was a theoretical physicist that assisted in some of my early tests of this theory. Ray's concept of string theory and super-string theory helped to reinforce my understanding of time, and that it as a principle isn't simple just a single, straight line."

"To physicists, time is what's measured by clocks. Using this definition, we can manipulate time by changing the rate of clocks, which changes the rate at which events occur. Einstein showed that time is affected by motion, and his theories have been demonstrated experimentally by comparing time on an atomic clock that has traveled around the earth on a jet. It's slower than a clock on earth."

Although the jet-flying clock regained its normal pace when it landed, it never caught up with earth clocks — which means that we have a time traveler from the past among us already, even though it thinks it's in the future.

What prompted Mallett, as a child, to investigate time travel was a desire to change the past in hopes of a different future. When he was 10 years old, his father died of a heart attack at age 33. After reading The Time Machine by H.G. Wells, Mallett was determined to find a way to go back and warn his father about the dangers of smoking.

This personal element fueled Mallett's perseverance to study science, master Einstein's equations, and build a professional career with many high notes.

"When I left U-Conn and went to MIT to follow funding for my research, I never would have imagined the possibilities that would have been revealed in the intervening years. The presence of the Evolved — the realization that what we as scientists thought was possible could be turned so soundly upside-down — it has given me a whole new perspective on the future and what mankind is capable of."

"The future is limited only by our own imaginations, and what the human spirit is capable of."

Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License