Quantum Teleportation Between Atomic Systems Over Long Distances

[Alex_Spider]

http://www.zeitnews.org/applied-sciences/computer-science/quantum-teleportation-between-atomic-systems-over-long-distances

Researchers have been able to teleport information from light to light at a quantum level for several years. In 2006, researchers at the Niels Bohr Institute succeeded in teleporting between light and gas atoms. Now the research group has succeeded in teleporting information between two clouds of gas atoms and to carry out the teleportation -- not just one or a few times, but successfully every single time.

The results are published in the scientific journal, Nature Physics.

"It is a very important step for quantum information research to have achieved such stable results that every attempt will succeed," says Eugene Polzik, professor and head of the research center Quantop at the Niels Bohr Institute at the University of Copenhagen.

The experiments are conducted in the laboratories of the research group in the basement under the Niels Bohr Institute. There are two glass containers, each containing a cloud of billions of caesium gas atoms.

The two glass containers are not connected to each other, but information is teleported from the one glass cloud to the other by means of laser light. The light is sent into the first glass container and then that strange quantum phenomenon takes place, the light and gas become entangled. The fact that they are entangled means that they have established a quantum link -- they are synchronised.

Both glass containers are enclosed in a chamber with a magnetic field and when the laser light (with a specific wavelength) hits the gas atoms, the outermost electrons in the atoms react -like magnetic needles -- by pointing in the same direction. The direction can be up or down, and it is this direction that makes up quantum information, in the same way that regular computer information is made up of the numbers 0 and 1.

The gas now emits photons (light particles) containing quantum information. The light is sent on to the other gas container and the quantum information is now read from the light and registered by a detector. The signal from the detector is sent back to the first container and the direction of the atoms' electrons are adjusted in relation to the signal. This completes the teleportation from the second to the first container.

New method

The experiments are carried out at room temperature and the gas atoms therefore move at a speed of 200 meters per second in the glass container, so they are constantly bumping into the glass wall and thus lose the information they have just been encoded with. But the research group has developed a solution for this.

"We use a coating of a kind of paraffin on the interior of the glass contains and it causes the gas atoms to not lose their coding, even if they bump into the glass wall," explains Professor Eugene Polzik. It sounds like an easy solution, but in reality it was complicated to develop the method. Another element of the experiment was to develop the detector that registers the photons. Here the researchers developed a particularly sensitive detector that is very effective at detecting the photons. The experiments therefore works every single time.

But it is one thing to perform tests in a laboratory and quite another to apply it in wider society! In the experiment, the teleportation's range is ½ meter -- hardly impressive in a world where information must be transported around the world in no time.

"The range of ½ meter is entirely due to the size of the laboratory," explains Eugene Polzik with a big smile and continues -- "we could increase the range if we had the space and, in principle, we could teleport information, for example, to a satellite." The stable results are an important step towards the quantum communication network of the future.

 

[Manic]

and then a fly gets caught in the light wave...

 

[Synekal]

How long before this ability gets "accidentally" transferred to a German Priest thus turning him blue and furry in the process?

 

[TheDreamMaster]

I still doubt we'll ever transport people. Isn't it thought actual teleportation kills the original and makes an exact copy at the other end?

 

[zeroapoc]

That's what I've heard said but I don't know how you would go about proving that one way or the other.

 

[childeroland]

Well, it takes courage to climb into that machine, not knowing, if you'll be the man in the box, or the prestige.

 

[zeroapoc]

Well, it takes courage to climb into that machine, not knowing, if you'll be the man in the box, or the prestige.

Great reference. t:

 

[childeroland]

Thanks

 

[Victarion]

I think I'll stick with walking.

 

[Breogan]

I still doubt we'll ever transport people. Isn't it thought actual teleportation kills the original and makes an exact copy at the other end?

If it's an exact copy, so long as your memories/experiences come with, what difference does it make?

 

[Farren]

I think this stems from the same quantum entanglement theory that freaked Einstein out.

But I can't speak much more on the subject, and I'll defer to the expert:

 

[KevanG]

And the next step up from gas atoms? Puppies!

 

[zeroapoc]

And the next step up from gas atoms? Puppies!

Or a baboon. In honor of Seth Brundle.

 

[Breogan]

Or a baboon. In honor of Seth Brundle.

Or an insideout pig-lizard.

Really what could go wrong.

 

[Spider-Who?]

If it's an exact copy, so long as your memories/experiences come with, what difference does it make?

Because YOU who steps into the machine will be dead. It won't make a difference to other people or the version of you that steps out of the machine on the other side, but you, the original, will cease to exist.

 

[Breogan]

Because YOU who steps into the machine will be dead. It won't make a difference to other people or the version of you that steps out of the machine on the other side, but you, the original, will cease to exist.

If it is, as was said - "an exact copy" .. that according to you "won't make a difference to other people or the version of you that steps out".
If your memories/experiences all come with, what difference does it make?

Unless you and TheDreamMaster are saying the version is not and exact copy, and will make a difference to you and everyone?

But you are not saying that.

 

[TheDreamMaster]

So again if it is as was said - "an exact copy" .. that "won't make a difference to other people or the version of you that steps out". So long as your memories/experiences come with, what difference does it make?

I figure it'd matter to you if you died. I mean yes a version of you comes out the other side, but technically you cease to live. So I'd figure living would still matter to you, even if everyone else still got you.

 

[Breogan]

... you cease to live.

No, you continue to live.
Your memories/experiences all come with, they said it's "an exact copy" ... that "won't make a difference to other people or the version of you that steps out".

 

[zeroapoc]

An exact copy with your memories still means you will have died. That would matter to me.

Like I said before I'm not sure how it would be proven though.

 

[Snow Queen]

I believe what they are getting at, Mondragon, is kind of like if you return your laptop for a new one, back it up before hand, and reload everything onto the new one. It looks the same, acts the same, has the same memory, but it's not the same.

 

[Breogan]

An exact copy with your memories still means you will have died. That would matter to me.

Like I said before I'm not sure how it would be proven though.

By the fact that you're still alive.


Let's put it this way, we've got teleporters, the Earth is about to get nuked out of existence, you can stay here or we can teleport you somewhere safe. Here's the working description we are talking about.

Your memories/experiences all come with, ... it's "an exact copy" ... that "won't make a difference to other people or the version of you that steps out".

It shouldn't make a difference if you really think they are both death, but which one will you choose, "die" on Earth, or through the teleporter?

 

[zeroapoc]

I quit.

 

[Boom]

Even if the copy is an exact replica of you, right down to the last memory, it is still a replica.

You, the original, will cease to exist.

 

[Thundercrack85]

That's not you though. Not you the person who was born, and lived X amount of years.

It's simply a copy. So, if you want a copy of you to survive the war, great. But the original is lost.

 

[Breogan]

Even if the copy is an exact replica of you, right down to the last memory, it is still a replica.

You, the original, will cease to exist.

It's an exact replica, what's the difference?

That's not you though. Not you the person who was born, and lived X amount of years.

It's simply a copy. So, if you want a copy of you to survive the war, great. But the original is lost.

It's an exact copy, what's the difference?


You'd stay to get nuked on Earth because of a supposed difference that you can't pinpoint or describe, that "won't make a difference to other people or the version of you that steps out".?

You'd all probably kill to get in that teleporter, why"? To continue to exist, ie to continue live!