ALL SCI-FI Forum Index ALL SCI-FI
The place to “find your people”.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

WARP DRIVE IS POSSIBLE!

 
Post new topic   Reply to topic    ALL SCI-FI Forum Index -> SCIENCE now, add FICTION later
View previous topic :: View next topic  
Author Message
Gord Green
Galactic Ambassador


Joined: 06 Oct 2014
Posts: 2940
Location: Buffalo, NY

PostPosted: Fri Apr 23, 2021 2:38 pm    Post subject: WARP DRIVE IS POSSIBLE! Reply with quote

Fascinating article that could change our concepts of intersteller travel.
------------------------------------------------------

https://www.yahoo.com/news/warp-drives-physicists-chances-faster-173833579.html

Mario Borunda, Associate Professor of Physics, Oklahoma State University

Fri, April 23, 2021

If humanity ever wants to travel easily between stars, people will need to go faster than light. But so far, faster-than-light travel is possible only in science fiction.



In Issac Asimov’s Foundation series, humanity can travel from planet to planet, star to star or across the universe using jump drives. As a kid, I read as many of those stories as I could get my hands on. I am now a theoretical physicist and study nanotechnology, but I am still fascinated by the ways humanity could one day travel in space.

Some characters – like the astronauts in the movies “Interstellar” and “Thor” – use wormholes to travel between solar systems in seconds. Another approach – familiar to “Star Trek” fans – is warp drive technology. Warp drives are theoretically possible if still far-fetched technology. Two recent papers made headlines in March when researchers claimed to have overcome one of the many challenges that stand between the theory of warp drives and reality.

But how do these theoretical warp drives really work? And will humans be making the jump to warp speed anytime soon?

Physicists’ current understanding of spacetime comes from Albert Einstein’s theory of General Relativity. General Relativity states that space and time are fused and that nothing can travel faster than the speed of light.
General relativity also describes how mass and energy warp spacetime – hefty objects like stars and black holes curve spacetime around them. This curvature is what you feel as gravity and why many spacefaring heroes worry about “getting stuck in” or “falling into” a gravity well. Early science fiction writers John Campbell and Asimov saw this warping as a way to skirt the speed limit.

What if a starship could compress space in front of it while expanding spacetime behind it? “Star Trek” took this idea and named it the warp drive.

In 1994, Miguel Alcubierre, a Mexican theoretical physicist, showed that compressing spacetime in front of the spaceship while expanding it behind was mathematically possible within the laws of General Relativity. So, what does that mean? Imagine the distance between two points is 10 meters (33 feet). If you are standing at point A and can travel one meter per second, it would take 10 seconds to get to point B. However, let’s say you could somehow compress the space between you and point B so that the interval is now just one meter.

Then, moving through spacetime at your maximum speed of one meter per second, you would be able to reach point B in about one second. In theory, this approach does not contradict the laws of relativity since you are not moving faster than light in the space around you.

Alcubierre showed that the warp drive from “Star Trek” was in fact theoretically possible.

Proxima Centauri here we come, right? Unfortunately, Alcubierre’s method of compressing spacetime had one problem: it requires negative energy or negative mass.
Alcubierre’s warp drive would work by creating a bubble of flat spacetime around the spaceship and curving spacetime around that bubble to reduce distances. The warp drive would require either negative mass – a theorized type of matter – or a ring of negative energy density to work. Physicists have never observed negative mass, so that leaves negative energy as the only option.

To create negative energy, a warp drive would use a huge amount of mass to create an imbalance between particles and antiparticles. For example, if an electron and an antielectron appear near the warp drive, one of the particles would get trapped by the mass and this results in an imbalance. This imbalance results in negative energy density. Alcubierre’s warp drive would use this negative energy to create the spacetime bubble.

But for a warp drive to generate enough negative energy, you would need a lot of matter. Alcubierre estimated that a warp drive with a 100-meter bubble would require the mass of the entire visible universe.

In 1999, physicist Chris Van Den Broeck showed that expanding the volume inside the bubble but keeping the surface area constant would reduced the energy requirements significantly, to just about the mass of the sun. A significant improvement, but still far beyond all practical possibilities.

A sci-fi future?

Two recent papers – one by Alexey Bobrick and Gianni Martire and another by Erik Lentz – provide solutions that seem to bring warp drives closer to reality.

Bobrick and Martire realized that by modifying spacetime within the bubble in a certain way, they could remove the need to use negative energy. This solution, though, does not produce a warp drive that can go faster than light.

Mario Borunda, Associate Professor of Physics, Oklahoma State University
Fri, April 23, 2021,

_________________
There comes a time, thief, when gold loses its lustre, and the gems cease to sparkle, and the throne room becomes a prison; and all that is left is a father's love for his child.
Back to top
View user's profile Send private message Send e-mail
Bud Brewster
Galactic Fleet Admiral (site admin)


Joined: 14 Dec 2013
Posts: 17020
Location: North Carolina

PostPosted: Fri Apr 23, 2021 4:35 pm    Post subject: Reply with quote

________________________________

Great article about the future of space travel! Thanks for providing the source of the information.

Doing that allows us to check out the original article and follow up on the additional information it provides. That's why I always provide the link to the source of my information. Very Happy

I urge all members of All Sci-Fi to site the sources of the articles they quote.

Its not only helpful to our members, it's also the correct way for scholars to give credit to the authors whose work they share with other folks on message boards like All Sci-Fi.

After all, we wouldn't want anybody to think WE wrote something we'd copied from somewhere else!

Right? Shocked

_________________
____________
Is there no man on Earth who has the wisdom and innocence of a child?
~ The Space Children (1958)
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    ALL SCI-FI Forum Index -> SCIENCE now, add FICTION later All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group