Physics idea

Harte

Senior Member
Messages
4,562
Re: Physics idea

You just have to quantum tangle 2 particules, then have the mean to read spin change of the particles. Once entangled, the 2 atoms will react INSTANTLY ALIKE, so if you change the spin of a proton, the other one will change spin at the same time, no matter the distance.

It works, there were experiments done on this concept... I just don't know how far along developement is of this technology...imagine, UNLIMITED DISTANCE INSTANT COMMUNICATION...

It don't work that way.

You can't alter anything for the nearby particle and expect the distant one to change.

What entanglement does is that when you observe the nearby particle (which collapses that particle's probability wave,) the distant particle has it's probability wave collapse simultaneously and that distant particle exhibits the same quantum state as the nearby one.

You can't possibly communicate like that.

Harte
 

StarLord

Senior Member
Messages
3,187
Re: Physics idea

Au Contraire Mon Amis,

Here's a start:

Long-distance quantum communication gets closer as physicists increase light storage efficiency by an order of magnitude

March 1, 2010 By Lisa Zyga (PhysOrg.com) -- In a new demonstration of reversible light storage, physicists have achieved storage efficiencies of more than a magnitude greater than those offered by previous techniques. The new method could be useful for designing quantum repeaters, which are necessary for achieving long-distance quantum communication.


Physicists Thierry Chaneličre of the Laboratoire Aimé Cotton - CNRS in Orsay, France, and his coauthors have published their results of the new light storage method in a recent issue of the New Journal of Physics.
The new technique involves mapping a light field onto a thulium-doped crystal. Compared with other kinds of rare-earth ions, thulium has an interaction wavelength that makes it more easily accessible with laser diodes, allowing for a better preparation of the tool used to store the light - an atomic frequency comb.
“I would say that the most important factor [in achieving high-efficiency light storage] is the ability to properly prepare the atomic comb from a very absorbing medium,” Chaneličre told PhysOrg.com. He explained that there is a tradeoff involved: “the absorption allows the storage, but is also a source of loss during the retrieval process.”
To prepare the atomic frequency comb, the physicists filtered preparation pulses into evenly spaced absorption peaks, which resulted in an absorption comb with a specific periodicity. The scientists then sent a weak signal pulse into the comb to be stored. The signal’s spectrum was covered by many of the comb peaks, which temporarily held the signal and delayed its retrieval.
Using this technique, the physicists estimated that the total light storage efficiency was about 9%, which is a significant improvement over previous demonstrations’ efficiencies of less than 1%.
“The efficiency is the probability of retrieval,” Chaneličre explained. “In our case, for 100 storage trials, we only retrieve our photon nine times. So we need to repeat the operation to be sure that something is transmitted. This is the way a quantum repeater will work. A strong advantage of the atomic frequency comb protocol is its large intrinsic repetition rate that has already been demonstrated experimentally. The ‘quantum data rate’ of a quantum repeater will be at the end directly proportional to the efficiency and the intrinsic repetition rate. That's why it is so important.”
The scientists also found that the total light storage efficiency strongly depends on the shape of the frequency comb, which can be controlled by varying the relative intensity of the preparation pulses. Using this information, the physicists hope that by controlling the spectral properties of the atomic frequency comb, they will be able to improve the design of quantum repeaters.
“The main application of the protocol is quantum repeaters,” Chaneličre said. “This is the future of quantum cryptography, which is an active field of research but suffers from the limitation of current optical networks. The range of this fully-secured communication is currently limited to 100km typically because of residual absorption in the optical fibre. The goal of a quantum repeater is to extend this range toward longer distances (thousands of km). This is what we mean by ‘long-distance quantum communication.’”


More information: T. Chaneličre, J. Ruggiero, M. Bonarota, M. Afzelius, and J-L Le Gouet. “Efficient light storage in a crystal using an atomic frequency comb.” New Journal of Physics, 12 (2010) 023025. http://www.iop.org/EJ/abstract/1367-2630/12/2/023025/
 

Grayson

Conspiracy Cafe
Messages
1,117
Re: Physics idea

Back to the original idea behind this... I think it's marvellous. Lateral thinking, quite literally.

Problems... mass as has been pointed out would be an issue in getting it moving, then inertia in slowing it down. Mass over such a length would compress and would be also subject to the vagaries of solar energies like heat, which would cause the object to lengthen like a railway line. The real beauty of it is this though; if you push hard enough, the tip at Mars would strike the surface and leave a series of dots and dashes in that alien soil and thus create a permanent record of the message due to Mars' rotation. This would be an eco friendly system as you'd never need paper to record the message.

I think we should seriously consider this idea and form a concept development committee.
 

Keroscene

Active Member
Messages
571
Re: Physics idea

Aw Grayson you made me blush...

Why can't matter be close enough to react instantly on the other side?
 

StarLord

Senior Member
Messages
3,187
Re: Physics idea

you would need to wreak havoc with basic laws. In a closed system, you get anything you wish to add or subtract to that system.

How do you negate these laws from here to mars?

Grayson and Keroscene have just discovered planetary LP's.

I want to see the Diamond Stylus that plays the Brobdingnagian Construct.
 

Harte

Senior Member
Messages
4,562
Re: Physics idea

Back to the original idea behind this... I think it's marvellous. Lateral thinking, quite literally.

Problems... mass as has been pointed out would be an issue in getting it moving, then inertia in slowing it down. Mass over such a length would compress and would be also subject to the vagaries of solar energies like heat, which would cause the object to lengthen like a railway line. The real beauty of it is this though; if you push hard enough, the tip at Mars would strike the surface and leave a series of dots and dashes in that alien soil and thus create a permanent record of the message due to Mars' rotation. This would be an eco friendly system as you'd never need paper to record the message.

I think we should seriously consider this idea and form a concept development committee.
But what if Mars doesn't appreciate being poked incessantly?

No, really, the "push" you give your rod (no pun intended) will travel to Mars at the speed of sound (not the speed of sound in air, the speed of sound in the material the rod is made out of.)

That is because such a push constitutes a compression wave in the rod.

Harte
 

StarLord

Senior Member
Messages
3,187
Re: Physics idea

Out side of magic, where will you store the 216 Million + - miles of rod which makes up the difference in your communications device from when Mars is the closest 54.6 Million km /34 Million Miles to 401 Million km /250 Million miles at it's farthest point?

That's one SERIOUS deep sea fishing rig.

Harte, that sounds like it's right down your expertise alley. What would the weight of that rod be? supply dimensions as you see fit.

Now, the other massive conundrum facing the think tank here, what are you going to use as a source of power to have the business end of this rod chase Mars, AND how are you going to steer it? Are you going to waste energy chasing Mars or heading towards where it's going to be in a few years ?

While watching this neat little program, what are you going to make the Rod out of, that will tolerate motions like the following?

http://illuminations.nctm.org/ActivityDetail.aspx?id=119
 

Harte

Senior Member
Messages
4,562
Re: Physics idea

Doesn't matter, does it?

I mean, we can already communicate with Mars at the speed of light.

IIRC, that's much faster than the speed of sound, regardless of the medium the sound travels in.

Harte
 

StarLord

Senior Member
Messages
3,187
Re: Physics idea

Ah, then in that case we need to go back to the Ansible.

"A 2008 quantum physics experiment performed in Geneva, Switzerland has determined that the "speed" of the quantum non-local connection (what Einstein called spooky action at a distance) has a minimum lower bound of 10,000 times the speed of light.[13] However, modern quantum physics cannot expect to determine the maximum given that we do not know the sufficient causal condition of the system we are proposing."

Imagine, 10,000 time the speed of Light.

As Binary code is a series of 0's & 1's, why not have information sent using the state of Off and On to take the place of the Binary code sequence. Hell, even Morse Code at that speed would make sense.

Imagine, having a message arrive before it was even sent.
 

Harte

Senior Member
Messages
4,562
Re: Physics idea

As Binary code is a series of 0's & 1's, why not have information sent using the state of Off and On to take the place of the Binary code sequence.

Because there is no way to determine (or send) the message without observing the media (light, or whatever.)

The particles have to be in an unknown state at the moment(s) of observation. The particles cannot be pre-arranged into any kind of pattern (as that would itself involve observation.)

So both parties at both ends of the "communication" device weould see nothing but a random series of different quantum states displayed by the particles being used.

Harte
 

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