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n2doc

(47,953 posts)
Mon Jul 22, 2013, 06:21 PM Jul 2013

Nasa experiment: Is faster-than-light travel possible?

Danny Hakim, New York Times | Jul 23, 2013, 03.20 AM IST

HOUSTON: Beyond the security gate at the Johnson Space Center's 1960s-era campus here, inside a two-story glass and concrete building with winding corridors, there is a floating laboratory.

Harold G White, a physicist and advanced propulsion engineer at NASA, beckoned toward a table full of equipment there on a recent afternoon: a laser, a camera, some small mirrors, a ring made of ceramic capacitors and a few other objects.

He and other NASA engineers have been designing and redesigning these instruments, with the goal of using them to slightly warp the trajectory of a photon, changing the distance it travels in a certain area, and then observing the change with a device called an interferometer. So sensitive is their measuring equipment that it was picking up myriad earthly vibrations, including people walking nearby. So they recently moved into this lab, which floats atop a system of underground pneumatic piers, freeing it from seismic disturbances.

The team is trying to determine whether faster-than-light travel — warp drive — might someday be possible.

Warp drive. Like on "Star Trek."

"Space has been expanding since the Big Bang 13.7 billion years ago," said Dr. White, 43, who runs the research project. "And we know that when you look at some of the cosmology models, there were early periods of the universe where there was explosive inflation, where two points would've went receding away from each other at very rapid speeds."

"Nature can do it," he said. "So the question is, can we do it?"

more

http://timesofindia.indiatimes.com/home/science/Nasa-experiment-Is-faster-than-light-travel-possible/articleshow/21258841.cms

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Nasa experiment: Is faster-than-light travel possible? (Original Post) n2doc Jul 2013 OP
This alcuibierre (sp?) warp drive idea is a fascinating one IMHO. Warren DeMontague Jul 2013 #1
More about Dr. Harold White and warp drives on the Icarus Interstellar website LongTomH Jul 2013 #2
2013 is certainly too early to rule out FTL travel as "impossible" Lugal Zaggesi Jul 2013 #3
One or two centuries is actually a good measure. DetlefK Jul 2013 #4
We have EM tractor beams ? Lugal Zaggesi Jul 2013 #5

Warren DeMontague

(80,708 posts)
1. This alcuibierre (sp?) warp drive idea is a fascinating one IMHO.
Mon Jul 22, 2013, 06:24 PM
Jul 2013

I've always been "nope. nope. can't be done. sorry" but dude may actually have a point.

LongTomH

(8,636 posts)
2. More about Dr. Harold White and warp drives on the Icarus Interstellar website
Mon Jul 22, 2013, 07:11 PM
Jul 2013
Dr. Harold Wilson is on the X-Physics Propulsion & Power Project (XP4) for the Icarus Interstellar Project. Their mission, according to Icarus International:

Implementation of FTL interstellar travel via space warps generally requires the engineering of spacetime into very specialized local geometries. The analysis of these via General Relativity plus the resultant equations of state demonstrate that such geometries require the use of “exotic” matter fields. The natural and phenomenological forms of exotic matter include; squeezed quantum vacuum states (includes the class of Casimir vacuum states), Gravitationally redshifted or gravitationally squeezed quantum vacuum states, Casimir vacuum energy, Cosmological inflation, dark energy/cosmological constant, phantom energy and others.

Current theoretical efforts regarding space warp geometries typically focus on exploring novel spacetime metrics and their associated properties. Experimental work is currently limited, but typically centers around studying Casimir vacuum energy. Interestingly, recent advances in the field of Metamaterial (artificial materials engineered to have properties not found in nature) have allowed for the possibility of simulating exotic metrics in the lab.

Salient issues that have been identified, and that motivate further research include:

• Quantum back reaction effects in 3+1 dimensional spacetimes
• Casual disconnection and controlling warp bubbles from bubble interior
• Examination of quantum inequality restrictions for wormholes
• Issues of causality and the temporal paradoxes
• Experimental metric modeling via metamaterials



Artist's drawing of an FTL starship

 

Lugal Zaggesi

(366 posts)
3. 2013 is certainly too early to rule out FTL travel as "impossible"
Tue Jul 23, 2013, 01:28 AM
Jul 2013

But I wouldn't expect much progress in the next 200 years.

I'd be much happier if they just threw some serious resources towards former astronaut Franklin Chang-Diaz's VASIMR propulsion system:
http://www.spaceflightnow.com/news/n1006/01vasimr/

That's doable, right now.
Fission power on spaceships - that's doable, right now.

Fusion power on spaceships - hopefully that's doable within 30 years.
Get to 1/10 the speed of light this century, and I'll be impressed. 1/2 c, and I'd be floored.

Get to work on antimatter as a way for storing energy for starships - I'll be even more impressed this century.
http://www.space.com/17537-antimatter-fusion-engines-future-spaceships.html
(although this technology would probably be commandeered by the Generals for awesome weapons - let's not destroy Humanity before we reach the stars, shall we ?)

This century, if they can get some spaceships to the Kuiper Belt (30 to 50 AU away from Sun, about 7 light-hours) - I'll be happy.

Faster-than-light travel - if they make NO progress till the 22nd century, I won't be surprised.

DetlefK

(16,423 posts)
4. One or two centuries is actually a good measure.
Tue Jul 23, 2013, 05:15 AM
Jul 2013

It took us ~150 years to get from the Maxwell-equations of electromagnetism to an electromagnetic tractor-beam.

It took us ~100 years to get from Schrödinger and Einstein to quantum-computing.

It took us ~65 years to get from Schrödinger's equation to building the first scanning-tunneling-microscopes.

It took us ~50 years to get from Lise Meitner's explanation of nuclear fission to the recent standard-model of particles and forces. (strong, weak, em)

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