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Heavenknight_18

PostPosted: Sat Aug 12, 2006 1:43 am


Cynthia_Rosenweiss
you cannot know the where about of a particle at any given time.
Yes, that's what I've read as well. Speed and location cannot be simultaneously known. The more you know about a particle's speed, the less you know about it's location and vice versa. (The Uncertainty Principle of Heisenberg.)
PostPosted: Sat Aug 26, 2006 4:33 am


Dave the lost
original german
Jedenfalls bin ich �berzeugt, dass der nicht w�rfelt.
- At any rate, I am conviced that he does not play dice.


I like what Hawking says on the dice subject, "God not only place with dice, He sometimes rolls them where you can't find them."

gnldad


gnldad

PostPosted: Sat Aug 26, 2006 4:49 am


poweroutage
Dave the lost
I believe you are referring to entangling A and B, then entangling B and C, and thus A and C are also entangled by inference.

Try looking up EPR paradox (EPR is Einstein, Podovsky and Rosen if memory serves).

As far as I'm aware, the idea is that it is impossible to transmit information via the link, thus causing it to not violate the laws of physics by transmitting data faster than the speed of light.
Which would make them moderately impossible to use for teleportation.


but this is exactly what they reported as having been done in the Discovery magazine. they reported a successful experiment involving teleportation!!! they did this!!! Discovery magazine!!! how is this impossible then?


The Physics of Star Trek by Lawrence M Krauss deals with the question. I don't remember the details of his chapter on teleportation, but he questions the viability of most of the Star Trek "miracles" based on the massive amounts of energy required rather than breaking any particular laws of Physics.
PostPosted: Sat Sep 23, 2006 10:42 am


Beyond_Oblivion
There is also the teleportation of states between coupled Josephson junctions which has the possibility of being used to instantaneously transmit information over any distance.

Um, I beleive thats called oscillation, son.

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PostPosted: Sat Sep 23, 2006 10:55 am


A Lost Iguana
Cynthia_Rosenweiss
Dave the lost
2. Heisenberg was german, but I don't know of any germans challenging uncertainty, link/source?


Well, there's at least one famous German who wasn't too happy with uncertainty.

"I can't believe that God plays dice."

- Einstein

It was said "He" in his famous quote but I can't remember the German exactly. Anyway, evidence suggests Einstein was wrong to doubt QM.

Well, remember that he created general relativity? So of course he did, because he saw an underlying order in the bigger picture.

Think of this:
Three cells make up an organism. Keeping track of these cells chould be easy, right? Temperature, movement, speed, food intake and waste output.

Then think of six cells. A little harder, but definately trackable.

Now 15. At this point you start making minor errors, getting cells mixed up, and end up making mistakes that lead to failure in some errors.

OK, now 25. At this point, your exhausted, your head is probably spinning, and you make errors that fail the entire experiment.

Now bring it up a notch or two. 50. Organs become recognizeable, so you begin grouping the organism. Labeling different areas. This eases some pressure, and makes things better.

Now, lets go to 1000. You may be tinking, screw that i'm going home. But organs begin to become even clearer, and small subsections of those organs as well. You then get to have fluids of sorts, and as long as you know where they come from and where theyre going your set.

Now, the leap. 1 billion. you start wondering if your insane, but at this point external features are entirely recognizeable and systems begin to emerge. You can't keep track of everything, Temperature and intake and movement etc., but organs are very simple to manage at this point.

Thats the role of general relativity. A few atoms are nice, but a solar system or even a planet are impossible. But keeping track of the grouped areas of these places might be possible or plausible.
PostPosted: Mon Dec 25, 2006 5:16 pm


So if A and B are linked and B and C are linked and C does take the properties of A then doesn't that mean you are copying the data intead of interchanging it? So the way I see it this would be cloning. Of course I could be completely wrong but it seems to me that A doesn't change but C gains the traits of A. Is what I'm saying making sense or am I just blabbering on without coherent thought?

Shadow_Cosmos


Vannak

PostPosted: Tue Dec 26, 2006 7:15 pm


I believe that you can teleport via entanglement, however that is because, while you cannot transmit information, you can transmit a quantum superposition/state.
PostPosted: Mon May 28, 2007 3:32 pm


Vannak
I believe that you can teleport via entanglement, however that is because, while you cannot transmit information, you can transmit a quantum superposition/state.

The point, Vannak, is that forcing a state at distance IS teleporting information. Interestingly similar to pushing a 1 or 0 bit status without having to pass through the intervening space (at least that which we perceive) to get the 'information' there.

O1OO1OO1O1OO1111


whynaut

PostPosted: Tue Jun 05, 2007 3:12 am


Heavenknight_18
Yes, that's what I've read as well. Speed and location cannot be simultaneously known. The more you know about a particle's speed, the less you know about it's location and vice versa. (The Uncertainty Principle of Heisenberg.)


Therefore if one theoretically could know the exact properties of a particle, it would give that particle infinite velocity. Basically Picard would go KABLOOIE! every time they locked a transporter beam on him. However, I remember the show explaining that away with some science mumbo jumbo called a "Heisenberg compensator," an obvious joke on the impossibility of teleportation due to uncertainty principle.

Though another thing to wrap one's brain around is, if the idea of quantum entanglement ever does yield a human teleporter would it be you coming out the other end? As it is quantum teleportation is basically a process of removing the information of your particles (effectively killing you) and putting that information into some new particles (which would be seemingly making a new you).

Not to mention, if one's particle information could be saved onto some sort of computer, then what is to stop someone from placing that information on any set of particles? One could create as many 'you's as they wanted out of whatever spare particles were floating around.


lol I love science.
PostPosted: Thu Jun 14, 2007 11:42 am


Here's a diagram of a teleporter I drew up.

User Image - Blocked by "Display Image" Settings. Click to show.

H represents a hadamard gate. The Circle with a cross is a CNOT gate. M1 and M2 are classical measurements. The thick brown lines represent classical bits. X is a bit flip and Z is a phase flip. B is a bell state and psi is the wavefunction (in this case a qubit) you're teleporting.

You're welcome.

Morberticus


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PostPosted: Sat Jun 23, 2007 1:09 am


isn't that like genetics?
PostPosted: Sun Jun 24, 2007 9:43 pm


missthang808727
isn't that like genetics?


No, it's just a graphical representation of operations you can perform on a quantum bit of information to 'reconstruct/teleport' it to another location.

I can take you through the algorithm if you like?

Oh and I should stress that it's not my design or anything. It was given to me by my quantum information processing lecturer.

Morberticus

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The Physics and Mathematics Guild

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