EPR Entanglement

[Polaris]

I found very interesting information about teleportation technology - and it have connection with experiments in Half-Life (Anomalous Materials Lab Test chamber) and HL2 (Black Mesa East) - this crystals and anti-mass spectrometers. Also with thesis of Gordon Freeman ("Observation of Einstein-Podolsky-Rosen Entanglement on Supraquantum Structures By Induction through Nonlinear Transuranic Crystal of Extremely Long Wavelength (ELW) Pulse from Mode-Locked Source Array").
Its in really interesting document about Teleportation physics (also about quantum physics, ZPE technologies...).
This experiment has been effected at University of Innsbruck (where Freeman works) and info is from document created by US Air Force Research Laboratory...
I can send you this document by e-mail if you want.


Generation of entanglement and teleportation by Parametric Down-Conversion
(Bouwmeester et al., 1997; Zeilinger, 2003):

EPR (Einstein, Podolsky and Rosen) entangled photon pairs are
reated when a laser beam passes through a nonlinear ß-barium borate or BBO crystal. Inside the crystal (BBO, for example) an ultraviolet photon (wave-length = 490 nm) may spontaneously split into two lower energy infrared photons (wave-length = 780 nm), which is called parametric down-conversion. The two "down-conversion" photons emerge as independent beams with orthogonal polarizations (horizontal or vertical). (The orthogonal polarization states represent a classic example of the discrete quantum state variables that can be teleported. Other examples of discrete quantum variables that have been teleported using other schemes include the nuclear magnetic spin of a hydrogen atom, electronic excitations of an effective two-level atom, elementary particle spins, etc.) In the two beams along the intersections of their emission cones, we observe a polarization-entangled two-photon state. For the experimental realization of quantum teleportation, it is necessary to use pulsed downconversion. Only if the pulse width of the UV light, and thus the time of generating photon pairs is shorter than the coherence time of the down-converted photons, then interferometric Bell-state analysis can be performed. In this type of experiment, the pulses from a mode-locked Ti:Saphire laser have been frequency doubled to give pulses of . 200 fs duration (1 fs = 10-15 second). The interfering light is observed after passage through IR filters of 4 nm bandwidth giving a coherence time of . 520 fs. After retroflection during its second passage through the crystal, the UV pulse creates another pair of photons. One of these will be the teleported photon, which can be prepared to have any polarization. Beam splitters and photon detectors are used to perform the Bell-state analysis during the standard teleportation process that ensues.

 

[ríomhaire]

I can understand a little of this. The photon gets teleported? By how much?

 

[Angry Lawyer]

Yeah, a lot of Half-Life IS based on real physics.

Basically, the two particles become "entangled" - which means they share inherant properties over an infinite distance, and changing one particle instantly affects the other. So, if you hit one particle with a photon, it gets absorbed or something, and the other particle emits an exact copy.

Sadly, the technology (at the moment) only supports teleportation on a quantum scale. I.e. only photons, and other crap smaller than an atom, can be teleported. And its not quite "teleportation", but rather "destroy the crap at one end, and make an exact duplicate at the other end". So essentially, if you teleported a man, you'd be killing him and recreating him at the other end, which brings up a hell of a lot of ethical debates.

Kirovman could probably explain it better.

But, in the HL sense, the Combine use entanglement to do their teleportation (As evidenced by loads of hints dropped by Mossman, and the chapter at the end actually being called "Entanglement") - therefore beaming themselves directly to our universe, whereas we, apparently, use Xen.

-Angry Lawyer

 

[Polaris]

But, in the HL sense, the Combine use entanglement to do their teleportation (As evidenced by loads of hints dropped by Mossman, and the chapter at the end actually being called "Entanglement") - therefore beaming themselves directly to our universe, whereas we, apparently, use Xen.

Mayby because Mossman tell them how (Xen relay is work of Dr.Kleiner).

 

[Angry Lawyer]

Xen Relay != "Entanglement" or anything Calabi-Yau related.

Mossman, however, does tell them how to use Xen, through making them the Nova Prospekt teleporter.

-Angry Lawyer

 

[Polaris]

Xen Relay != "Entanglement" or anything Calabi-Yau related.

Mossman, however, does tell them how to use Xen, through making them the Nova Prospekt teleporter.

-Angry Lawyer

Yes, this is exactly what mean!

Link to info and diagram of this quantum teleportation setup

I have nice picture of this small anti-mass spectrometer from Black Mesa East:

 

[ríomhaire]

I don't think it will ever be able to teleport people and have them come out alive at the other end. Infact I don't teleportation will ever be useful for anything except maybe transporting raw materials.

 

[Angry Lawyer]

Considering how difficult it is to entangle just two particles, I don't think they'll ever scale it large enough to do anything useful. Quantum uncertainty kinda screws up its use for hyper-fast computers.

-Angry Lawyer

 

[ríomhaire]

Considering how difficult it is to entangle just two particles, I don't think they'll ever scale it large enough to do anything useful. Quantum uncertainty kinda screws up its use for hyper-fast computers.

-Angry Lawyer

Well any explaination of how teleportation could work to me sounds like the person would come out the end as a useless cloud ot particles.

 

[kirovman]

Yeah, a lot of Half-Life IS based on real physics.

Basically, the two particles become "entangled" - which means they share inherant properties over an infinite distance, and changing one particle instantly affects the other. So, if you hit one particle with a photon, it gets absorbed or something, and the other particle emits an exact copy.

Sadly, the technology (at the moment) only supports teleportation on a quantum scale. I.e. only photons, and other crap smaller than an atom, can be teleported. And its not quite "teleportation", but rather "destroy the crap at one end, and make an exact duplicate at the other end". So essentially, if you teleported a man, you'd be killing him and recreating him at the other end, which brings up a hell of a lot of ethical debates.

Kirovman could probably explain it better.

But, in the HL sense, the Combine use entanglement to do their teleportation (As evidenced by loads of hints dropped by Mossman, and the chapter at the end actually being called "Entanglement") - therefore beaming themselves directly to our universe, whereas we, apparently, use Xen.

-Angry Lawyer

Maybe I could...maybe I could. Wouldn't count on it though, I haven't studied teleportation apart from what you read in science magazines

Arguably if all the quantum properties of a person were teleported to another point, you wouldn't be able to distinguish between the original and duplicate, so you could call it true teleportation in that sense. Just from a quantum mechanical point of view, particles are not definate distinguishable things.

Yeah, but you'd get into the debate of whether teleportation is ethical, since the soul might not be transferable, etc.

I certainly wouldn't volunteer to get teleported, even if it had been 100% successful on all human subjects, since I wouldn't be able to tell if that was truely the original mind, or whether the original had died.

But this technology is only in its infancy. Only photons have been teleported (well don't know if they've teleported anything bigger).

It'll be quite a big leap up to be able to teleport an atom. It'd probably require a large energy too. To create the mass of the atom, you'd need the energy, as according to E=mc^2

To create a human, you'd probably need as more energy than in a standard nuclear bomb. That's just my guess though, there might be a way around that.

edit: yeah there's also the quantum uncertainty to consider too. :\



Quantum entanglement has more practical applications in information transfer with quantum computing. The teleportation of large fragments of matter seems to be a pipedream for now.

 

[Chrysalid]

Heh, the mini-antimass spectrometer is funny. It was a pity the player couldn't control the power ( it would have been funny to see if the resonance cascade would have re-appeared at 120 % )

"Gordon, what the hell are you doing??"

 

[mogcoro]

remember in HL1 ending...
g-man was speaking to you in xen where u can see microscopic images all the sky (like those living cells or becteria or whatever they are)

does that mean... before you teleport to somewhere you have to go through a "minimize" process in which your body is being deminished small enough so that you can go through the telepotation process?

does that mean... the border world Xen is just somewhere within the teleporter machine... only everything is magnifyed a 9999999999999(...) times?

{=O

 

[ríomhaire]

remember in HL1 ending...
g-man was speaking to you in xen where u can see microscopic images all the sky (like those living cells or becteria or whatever they are)

does that mean... before you teleport to somewhere you have to go through a "minimize" process in which your body is being deminished small enough so that you can go through the telepotation process?

does that mean... the border world Xen is just somewhere within the teleporter machine... only everything is magnifyed a 9999999999999(...) times?

{=O

I reaaaaaaaaaaaaaaaaaaaaly doubt that.

 

[Eejit]

Considering how difficult it is to entangle just two particles, I don't think they'll ever scale it large enough to do anything useful. Quantum uncertainty kinda screws up its use for hyper-fast computers.

-Angry Lawyer

Hmm, any possibility of use for very fast very long range communications (no interference either)?

 

[Angry Lawyer]

That tends to be the plan, apparently. Or something. The difficulty is actually entangling the particles, and entangling enough to actually transmit data at a high enough bandwidth.

And mog - giant bacteria are proven to exist on Xen. You see one in the resonance cascade, floating round a fungal spore. It's not people going microscopic - it's just single-celled life evolving to be really, really big.

-Angry Lawyer

 

[kirovman]

The information in quantum entanglement cannot be received faster than the speed of light anyway. I don't know why, I just know that "fact".

Also I think I discussed Xen being a microscopic world, but come to think of it, the Xen aliens are multicellular, so no.

 

[Angry Lawyer]

Really? I thought, because nothing's actually moving in Entanglement, it breaks that rule.

-Angry Lawyer

 

[kirovman]

No, it's something about the information cannot be dycrypted/interpreted faster than the equivilant information travelling at speed of light.

Don't look at me though, I don't know anything about Quantum Entanglement, apart from what I read in New Scientist for example.

 

[Angry Lawyer]

Ahh, the decyphering thing makes sense.

-Angry Lawyer

 

[Polaris]

You can download source of my informations, document about Teleportation physics (also about quantum physics, ZPE technologies, etc.) created by US Air Force Research Laboratory.

http://www.fas.org/sgp/eprint/teleport.pdf

PS Samon, can you move it to the SP Mythology forums, please? Thanks.

 

[lastHOPE_lambda]

What about the string theory? Couldn't we rip a hole in a dimension send a person through then open a rip some where else and extract them? Of coarse we'd have to break them down into atoms then reassemble those atoms when they arrived but it could work.

 

[stef10]

yes a think so we could use xen as a slingshot and send them away but how do you make a hole and remember this is fiction it could happent in the real world but humans are not so smart yet.

 

[lastHOPE_lambda]

Ummmmm this is gonna take some thought before we can think about how to rip open a dimension we have to think what a dimension is effected by. maybe we could super polerize two different objects that might create a rip.

 

[Jintor]

Would they keep their mind? Is their mind mere electricity, or is it a large blob of particles? Will they be sentinant when they come out of the other side of the wormhole? Will you put in a living human at one end and a corpse comes out of the other?

Ethical issues are many and varied.

In any case, developing teleportation just for the transportation of raw materials seems pretty 1337 anyway.

 

[lastHOPE_lambda]

We'll if we split them in to atoms and recombine them correctly when they come out they would only have short term memory loss.

 

[AJ Rimmer]

We'll if we split them in to atoms and recombine them correctly when they come out they would only have short term memory loss.

What do you base that on?:|

 

[lastHOPE_lambda]

Because memory loss from splitting someone into atoms is invetible but it is possible to only cause short term memory loss if we recombine them correctly enough. I'll explain futher if you want but if you think about it I'm sure you'll understand.