"We're looking for a change in path length of the photon on the interferometer, because that would be potential evidence that we're generating the effect we're looking for," White suggested. "We've seen, in a couple different experiments with several different analytic techniques, a change in optical-path length. We're making one leg of the interferometer seem a little shorter because of this device being on, versus the device being off. That doesn't mean that it's what we're looking for."
While these results are intriguing, they are in no way definitive proof that warp drive could work, White said. The scaled-down experiments are just a first step toward understanding if these concepts can be taken out of the realm of theory and applied practically. *Alcubierre Theory: Warp Drive In 1994, Miguel Alcubierre proposed moving not a spaceship, but space itself, faster than light. All that would be required is to distort the fabric of space-time into a bubble surrounding a spaceship. Enormous energy would be required, but once created, the bubble would move independently of the rest of the universe, even faster than light.
The bubble moves by compressing the space-time in front of it and expanding the space-time behind it.
NASA scientist Harold "Sunny" White belives as yet undiscovered "negative energy" could be used to create the space-warp bubble, using a smaller amount of total energy than Alcubierre thought possible.
DALLAS - Warp-drive technology, a form of "faster than light" travel popularized by TV's "Star Trek," could be bolstered by the physics of quantum thrusters - another science-fiction idea made plausible by modern science.
NASA scientists are performing experiments that could help make warp drive a possibility sometime in the future from a lab built for the Apollo program at NASA's Johnson Space Center in Houston.
A warp-drive-enabled spacecraft would look like a football with two large rings fully encircling it. The rings would utilize an exotic form of matter to cause space-time to contract in front of and expand behind them. Harold "Sonny" White, a NASA physicist, is experimenting with these concepts on a smaller scale using a light-measuring device in the lab.
Courtesy: by Miriam Kramer, Staff Writer | August 21, 2013 05:46am ET - Written for Space.com - with additions *
Spacetime diagram of an Alcubierre drive starship riding in a warp bubble
* A plausible alternative to travelling across space is the 'wormhole', a shortcut between two widely separated points in space-time. Wormholes have not yet been observed in nature, but they are not forbidden by our current understanding of physics. If they exist, wormholes would permit travel faster than light and backward through time (at least to the time when the wormhole was created.
Scientists Albert Einstein and Nathan Rosen first proposed the wormhole, or "Einstein-Rosen Bridge", in 1935
Quantum thrust through space-time Quantum-thruster physics, another technology White is looking into at NASA, could be the key to creating the fuel needed for a warp drive.
These electric "q-thrusters" work as a submarine does underwater, except they're in the vacuum of space, White told the crowd here at Starship Congress on Aug. 17. The spacecraft is theoretically propelled through space by stirring up the cosmic soup, causing quantum-level perturbations. The resulting thrust is similar to that created by a submersible moving through water.
The technology produces negative vacuum energy, a key ingredient for an exotic-matter-powered warp-drive engine. "The physics models that tell us how to construct a q-thruster are the same models we'll use to generate, design and build a negative vacuum generator," White said. "The quantum thrusters might be a propulsion manifestation of the physics, like the big ring around the spacecraft. If you looked in there, there might be 10,000 of these little cans that are the negative vacuum generators."
White wants to try to apply the quantum-thruster physics models the researchers have been working with in the lab to their work with warp drive.
"We have measured a force in several test devices which is a consequence of perturbing the state of the quantum vacuum," White said. The effect has been small but significant in his experimentation. Going forward, White hopes to do more robust testing to possibly magnify those claims.
Do the time warp The warp-drive ship itself would never be going faster than the speed of light, but the warped space-time around it could help the spacecraft achieve an effective speed of 10 times the speed of light within the confines of White's concept.
When first proposed by Mexican physicist Miguel Alcubierre in 1994, the warp drive would have required huge, unreasonable amounts of energy, but White's work brought those numbers down. Previous studies extrapolated that the drive would need energy equal to the mass energy of Jupiter.
"In the early epoch of the universe, there was a very short period known as inflation," said Richard Obousy, president of Icarus Interstellar. "We believe that during that inflationary period, space-time itself expanded at many times the speed of light, so there are tantalizing questions when you look at nature as a teacher. Is this something that can be duplicated around the vicinity of a spacecraft?"
Now, White thinks the drive could be powered by a collection of exotic mass about the size of NASA's Voyager 1 probe if the rings housing the mass were shaped like a donut and oscillate over time.
