Quantum Teleportation and Computation

[lepton]

The first action in the teleportation experiments done by the Innsbruck group is to create two entangled particles. This is done by sending a pulse of ultraviolet light through a type of crystal called a calcite crystal. This type of crystal is called a "non-linear crystal", probably because it splits photons (I wasn't able to find the definition). Inside of the crystal the UV photon is split into two photons whose polarization is entangled (polarization is the electrical charge of the photon. The polarization constantly changes). These first two photons are photons (objects) B and C. After the photons exit the crystal the UV pulse is reflected back through the crystal, while B and C are reflected to different stations. Photon C goes on to the receiving station where the teleported object will end up. Photon B is directed to the sending station. The pair of entangled photons are detected and the experiment starts. When the UV pulse is reflected back through the crystal photon A is created. A is sent to the sending station where a Bell-State measurement is performed on it and on photon B at the same time. A Bell-State measurement is the type of measurement the changes the state of C into the state of A. During the measurement A is scanned and the information is sent to the receiving station. There is a 25% chance that photon C will turn out exactly like A. So if the polarization is determined to be not the same polarization as A was it is sent through a crystal that will rotate its polarization until it matches A's (A's polarization could have been up, down, right, or left). The process has not been perfected yet and has a success rate of 75%.

In a related experiment, the use of HUP to alter what exists at another location via this calcite photon-splitting process is mind-blowing. Split the photon, measure it in one location, and alter the form of its double in the other, remote location. At the least, it's a capability for FTL communication...once the beam of split photons reach the ends of the transmission path.

[lepton]

LOL!

[JRandomFreeper]

who knew what "esoteric" meant.

I know what that means too. It's something Baptists don't approve. Shame on you. Bringing esotericism to a family forum. Next thing you know, we'll have pictures of Lithuanian fireplace designs on the thread.

/john

[lepton]

Don't Einstein's laws (using Quantum measures)

I seem to recall that Einstein referred to the above results in quantum mechanics as "spookiness from a distance". He agreed that the equations resulted in these types of answers, but refused to believe that they were real.

[habs4ever]

Oh boy, oh no...more things to consider as the day approaches.Palo, anything about this now?? LOL

[JRandomFreeper]

I think indirectly we do just that in particles accelerators.

I'm not thinking 10e-umpteen mass. I'm thinking 10e2 to 10e5 kg at 150K rpm and rotating around the center of mass, not orbiting.

I remember reading about an experiment with a large chunk of lead in an underground vault. And another with dry-cleaning fluid in an underground vault. Sheesh. I've got to go dig this stuff back up.

/john

[lepton]

On the other hand, at least some of what I have heard of quantum physics (which is admittedly not a lot) indicates that that is not necessarily true for elementary particle physics

One of the precepts of quantum mechanics is that "objects" don't really exist at a specific place, but could more reasonably be represented as probabilities centered around a certain area. If one cancels a probability in one place, that naturally increases the probability that the energy will exhibit itself somewhere else. This is kind of what the photon teleportation experiment appears to have done, by creating a barrier, sufficiently narrow that some small portion of the photon beam would mute itself to the other side of the barrier, and continue on its path, thereby arriving before it was expected.

[lepton]

At this point, science and philosophy will have to be reconciled

First they have to be addressing the same subject...then they have to define the terms the same way...then we can begin. :)

[Physicist]

Self-referential bump for later reading.

[lepton]

Even with QT, we're still not able to break past the speed of light, because after the scanning process the information still has to be sent at light speed or slower

No, the particles to be interacted with have to get to both the manipulation point, and the receiving point, once that is done, information travel is at least twice the speed of light (I've yet to see whether HUPs alterations is instantaneous or at the speed of light from the original locations, so I can't say if it is faster than 2c).

[PatrickHenry]

placemarker

[Don Joe]

"Refresh my memory. Didn't I read in Science News a little bit ago that scientists already 'teleported' a small frog (?)."

No, you're thinking of the experiment where someone magnetically levitated a frog in a metal tube.

[arthurus]

On this forum, when something in the world happens that is a mystery or is very important, or is esoteric-discussion of teleportation- the experts post. When flight 800 crashes with questions , witnesses post and people involved in the investigation, etc. Lawyers post with explanations of legal ramifications, insiders post, scientists and engineers can be relied on to post detailed explanations and directions to sources and background. FR is the best single source for details and explanations of just about any subject that comes up.

[arthurus]

On this forum, when something in the world happens that is a mystery or is very important, or is esoteric-discussion of teleportation- the experts post. When flight 800 crashes with questions , witnesses post and people involved in the investigation, etc. Lawyers post with explanations of legal ramifications, insiders post, scientists and engineers can be relied on to post detailed explanations and directions to sources and background. FR is the best single source for details and explanations of just about any subject that comes up.

[Frumious Bandersnatch]

Look, I may not know everything, but just because you don't understand what I am saying or trying to say doesn't make me inconsistent.  For the record, I do understand the difference between linear and non-linear systems (after all, I did manage somehow to get through remedial calculus in reform school :).

IMHO, the spatial dimensions as we know them are linear whereas time is not.  Or rather I should say that time is only linear to the objects within a particular time frame (or time plane if you will).  But no two time frames are linear to each other.  The faster one time frame goes in relation to another, the slower the objects within the speedy time frame move (as perceived by the slower time frame).  OTOH, to the speedy time frame, the objects within the slower time frame speed up.  In both time frames, the local speed remains the same.  However, both time frames are using the same spatial dimensions.  The spatial dimensions are on a straight line that is not changed by acceleration, velocity, gravity, or anything that we know (IOW, both parties are part of the same universe).  However, time is affected by the speed you are travelling (basic assumption: The faster you are travelling, the slower time becomes - except when listening to Daschle, when time and belief become suspended in the worm-hole of vacuous stupidity).

This argues that time, as we know it, is probably best graphed by using an asymptotic curve, whereas the spatial dimensions are best described using lines.  Thus my assertion that time is non-linear and spatial dimensions are linear.  If you feel that time is linear in nature and is affected by velocity, that's fine, because it is only a theory yet unproven (although immensely popular and useful amongst the scientific set).  I apologize if my choice of wording is not quite correct.  After all, I am not a physicist.  Perhaps I should have said "Doppler affect" instead of "red-shift."  I still think my point is valid and that having a non-linear dimension as part of a set of linear dimensions makes for some difficulties in calculations.

Which brings me to my last point.  Simply put, what would happen if you could convert the spatial dimensions within a given time-frame to the same non-linear system used by time?  Personally, I think that the affect might be similar to removing (or at least significantly compressing) one of the spatial dimensions.

[RadioAstronomer]

Thanks for the bump. I have some catching up to do. :)

[PatrickHenry]

A long time ago, I read an SF novel (might have been shorter than a novel) involving teleportation (there are thousands of such stories), but this one had the interesting feature that the person being teleported actually dies at the sending end, while the person who emerges at the other end is a duplicate with the same memories. So the emerging person is undisturbed by the death of his predecessor, because from his point of view he's the same person. But the poor devil going into the machine knows he's going to die. His only motivation is that he knows he's sending his duplicate off somewhere where he needs to go. The idea was well-developed. I don't remember the author, or even the plot, only that neat feature of the teleportation system.

[Physicist]

the interesting feature that the person being teleported actually dies at the sending end

Wasn't that Bones McCoy's basic objection to the transporter in Star Trek?

[PatrickHenry]

Wasn't that Bones McCoy's basic objection to the transporter in Star Trek?

McCoy often expressed an anti-technological dislike of "having your molecules scattered all over space," but I never recall "transmit/die" as being part of the Star Trek technology. Perhaps a hard-core Trekkie can fill us in.

[CubicleGuy]

Be confused. Be very confused.