Can science explain teleporting and time travel?

Answer 1

http://news.bbc.co.uk/2/hi/science/nature/3811785.stm

Answer 2

In H.G. Wells’ novel, THE TIME MACHINE, our protagonist jumped into a special chair with blinking lights, spun a few dials, and found himself catapulted several hundred thousand years into the future, where England has long disappeared and is now inhabited by two groups of strange creatures, the Morlocks and the Eloi.

That may have made great fiction, but physicists have always scoffed at the idea of time travel, considering it to be the realm of cranks, mystics, and charlatans, and with good reason. However, rather remarkable advances in quantum gravity are reviving the theory; time travel has now become fair game for theoretical physicists writing in the pages of PHYSICAL REVIEW magazine.

One stubborn problem with time travel is that it is riddled with several types of paradoxes. For example, there is the paradox of the man with no parents: What happens when you go back in time and kill your parents before you are born? If your parents died before you were born, then how could you have been born to kill them in the first place?

There is also the paradox of the man with no past. For example, let’s say that a young inventor is trying futilely to build a time machine in his garage. Suddenly, an elderly man appears from nowhere and gives the youth the secret of building a time machine. The young man then becomes enormously rich playing the stock market, race tracks, and sporting events because he knows the future. Then, as an old man, he decides to make his final trip back to the past and give the secret of time travel to his youthful self.

Read more at:
http://www.pbs.org/wnet/hawking/mysteries/html/kaku1-1.html

TELEPORTATION:
The feat was achieved by two teams of researchers working independently on the problem in the US and Austria.

The ability to transfer key properties of one particle to another without using any physical link has until now only been achieved with laser light.

Experts say being able to do the same with massive particles like atoms could lead to new superfast computers.

This development is a long way from the transporters used by Jean-Luc Picard and Captain Kirk in the famous Star Trek TV series.

When physicists talk about "teleportation", they are describing the transfer of "quantum states" between separate atoms.

These would be such things as an atom's energy, motion, magnetic field and other physical properties.

And in the computers of tomorrow, this information would form the qubits (the quantum form of the digital bits 1 and 0) of data processing through the machines.

Answer 3

Is Time Travel Possible?

You probably read Timeline, the book by Michael Crichton in which a group of historians travels back in time. As the movie adaptation is about to be released, Scientific American discussed with theoretical physicist Michio Kaku, whose ideas inspired Crichton, and asked him if time travel was plausible.

Before reading this interview, here are some references to the movie. Below is a production photo from the official site of the movie (Copyright 2003 Paramount Pictures and Mutual Film Company).

A production photo from 'Timeline'

And for your viewing pleasure, you also can watch in different resolutions a teaser or a trailer of the movie which opens in a theater near you on November 26 -- at least in the U.S..

Now, let's go back to Haku, who says that it's possible now to speak publicly about time travel without putting a career at risk, a thing unbelievable ten years ago.

Originally, the burden of proof was on physicists to prove that time travel was possible. Now the burden of proof is on physicists to prove there must be a law forbidding time travel.

He goes back to the past to tell us when scientists started to think about time travel in a rigorous way, from Einstein to logician Kurt Gödel or mathematician Roy Kerr.

Here are selected excerpts.

SA: The idea in Timeline is that you can "fax" particles into the past. What is the kernel of truth there?

MK: In the last ten years, there has been enormous progress in something called quantum teleportation. This is not science fiction anymore. Now, to be real, we're not talking about sending Captain Kirk across space and time. But we are talking about sending individual photons across space. In a few decades, maybe we will teleport the first virus, if the virus consists of a few thousand molecules. But at the present time, that's the limit of what we can do. And we can only teleport things in space, not time. But the concept of faxing matter is not totally out of the question. And that was also raised in my book. So, there is a little bit of truth there.

SA: How practical would it be to build one of these time machines?

MK: In fact the energies we are talking about are the energies of stars. It would take a civilization far more advanced than ours, unbelievably advanced, to begin to manipulate negative energy to create gateways to the past. But if you could obtain large quantities of negative energy -- and that's a big "if" -- then you could create a time machine that apparently obeys Einstein's equation, and perhaps the laws of quantum theory. You need string theory to ultimately control all the divergences [i.e., to make sure a hail of gravitons doesn't fry you when you open or close the time machine]. Some cynics say quantum effects may still make the machine blow up. But at this point the burden of proof has shifted: people who are skeptical of time travel have to prove it's impossible. And so far they have failed.

Kaku also speaks in detail about the paradoxes implied by time travel. and he discusses string theory or the influence of science fiction on physics. Scientific American also asked him what was his favorite time travel movie.

MK: Oh, that's a hard one. There is a problem being a physicist, and that is when you see these movies, you say, "Well, that's not right." And it really ruins it. But I like the Back to the Future series. Here was a movie where you actually saw the scientist building and doing things; he was an essential character in the entire series. Doc Brown was this crazy man, but at least they showed him. He was there. He was making the series work.

So is time travel possible? I'm still not sure, even if it would be fantastic to visit our past or our future.

Answer 4

Science has reason and because. because of this they will never understand time travel . If you have Mysticism and Science with Psychic Functioning then you are on the road to discovering technology involving time travel and inter-dimensional relationships


einstein came close... but .. Steven hawking knows we can and he realizes science is fallen into the pit of reason

Answer 5

yes it can
there is formula by einstein which states that if we cross or attain the velocity of light or mass becomes infinity.but there is no evidence.also the faster we travel the slower our age moves. so if we attain the speed of light it can be possible that we can time travel

Answer 6

Not yet, because at the present time, there is NO SUCH THING.

Answer 7

It can give theories, but can't get them to work.