Time travel is not possible right?

[My Hubby Loves Civ]

No, not trolling, just have always studied quantum physics since I always dreamed of building a space ship to explore the universe. I just know it is just around the corner. It only takes one awesome scientific advance in technology to blast us off!

[Lorizael]

Well, I've only been studying quantum physics for 3 weeks, so I don't know about any of that super rad stuff you talked about. All I can tell you about right now are Hilbert spaces and eigenvectors.

[The Mad Monk]

Einstein's general relativity has solutions that allow for time travel (wormholes). But traversable wormholes would require exotic forms of matter (unicorn meat, possibly) that physicists don't have any reason to believe exist. A lot of physicists also conjecture that causality is a thing the universe would want to preserve, but currently causality protection only emerges from other physical laws rather than being a law unto itself.

Did someone say Unicorn Meat?

[ricketyclik]

If you could move faster than the speed of light, you could go backward in time by moving through four dimensional space.

Nah, you'd only be travelling through older and older reflected light.

[dannubis]

you and your imaginary friend that is...

[ricketyclik]

Are you suggesting that faster than light travel is impossible? Please supply evidence.

[Lorizael]

Well, there's all the experimental confirmation of special relativity...

[My Hubby Loves Civ]

I believe the physicists are in the process of discovering the fluidity nature of the beginning of the Big Bang through their tests at CERN and LHC. Breaking light speed still seems impossible that is why the concepts for creating wormholes is being persued more in depth.

[Lorizael]

I don't think I'm high enough for you.

[My Hubby Loves Civ]

I am just a simple armchair enthusiast myself. So I had to go and dig up what I am referring to in my previous posts. I think the fluidity or Quark Gluon Plasma discoveries may enlighten us more on which theory regarding dark energy is correct. Understanding the expansion process of the universe, we may be able to manipulate small portals that collapse and expand naturally. Thus, it may seem as if we travel faster than light.

Then came 1998 and the Hubble Space Telescope (HST) observations of very distant supernovae that showed that, a long time ago, the Universe was actually expanding more slowly than it is today. So the expansion of the Universe has not been slowing due to gravity, as everyone thought, it has been accelerating. No one expected this, no one knew how to explain it. But something was causing it.
Eventually theorists came up with three sorts of explanations. Maybe it was a result of a long-discarded version of Einstein's theory of gravity, one that contained what was called a "cosmological constant." Maybe there was some strange kind of energy-fluid that filled space. Maybe there is something wrong with Einstein's theory of gravity and a new theory could include some kind of field that creates this cosmic acceleration. Theorists still don't know what the correct explanation is, but they have given the solution a name. It is called dark energy.

http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy/

Scientists at CERN have discovered QGP properties before they were shut down and in their most recent tests are exploring this further. I think dark energy, more so than dark matter, is where we will advance in faster than light speeds and seemingly time travel through our expanding universe.

http://home.web.cern.ch/about/physics/heavy-ions-and-quark-gluon-plasma

Aha! Found CERNs link regarding QGP. Have to admit these are exciting times we live in!

[ricketyclik]

Well, there's all the experimental confirmation of special relativity...

Exactly. Experimental. We're just humans, after all.

[My Hubby Loves Civ]

Humans have never advanced their knowledge base without first getting excited about a theory and then, being inspired to prove or disprove the possibility. True, some discoveries seem to just be happenstance, while attempting experiments. Yet, it all derives from the creativity of the human brain's need to know the unknown.

[My Hubby Loves Civ]

In astronomy and cosmology, dark fluid is an alternative theory to both dark matter and dark energy and attempts to explain both phenomena in a single framework.


Dark fluid proposes that dark matter and dark energy are not separate physical phenomena as previously thought, nor do they have separate origins, but that they are linked together and are really specific sub-effects of new extended laws of gravity at very large scales.


Basically, in 2008, this became a more simplified fluid theory based off the Chaplygin Gas theory. I believe with CERNs discovery of Quark Gluon Plasma within their LHC experiments, that scientists should begin to look more closely at this fluid theory.


Could time effectively be controlled by combining velocity and special relativity theories based on this new discovery? Basically creating an extreme Time dilation effect which astronauts already experience in minimal increments during their stay on the ISS.

Edit add: Though, even still, I can only believe this will only be a forward action. Time travelers will effectively leave this time and can only return in a future time. What may only be minutes for them may be actual years for those still riding on the present time line.
Edit add: even better food for thought. What if this has been accomplished already? Would we have to wait 80-100 years here on earth for their return to learn it was successful?

[Lorizael]

I've never heard of any links between dark energy and quark gluon plasmas. Quark gluon plasmas are interesting because current theories are very bad at predicting how giant bunches of naked subatomic particles should behave at very high temperatures, so data is necessary to give theorists motivation. But dark energy is currently thought to just be a property of space itself. And even if it's not, even if it is some kind of thing in the universe, it exists everywhere, even in places where the temperature is ~3 K, which means you have nothing like the conditions necessary for a QGP.

[My Hubby Loves Civ]

Little is officially known about what we are calling dark matter and dark energy. I was only saying that since the physicists at CERN discovered plasma where they originally expected it to be a gaseous state. They should look more closely at the dark fluid theory from 2008, that theorized that dark energy and matter are not separate.