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originally posted by: neoholographic
a reply to: dragonridr
Again, you're not checking for spin.
Say you have two entangled pulses of light containing entangled photons. You send one to Alice and one to Bob. When the photons are highly correlated, they will have a high signal to noise ratio and will have a strong correlation between arrival time and frequency.
You have a second channel. The same thing applies.
A third channel, the same thing applies.
Bob is now looking at these three channels who each have a high signal to noise ratio and are strongly correlated between arrival time and frequency. This can be determined beforehand because you're not sending information from Alice to Bob based on spin.
So Alice wants to change Bob's middle channel to an 0. She breaks entanglement in the second channel and the second channel will have a weaker signal to noise ratio and it's arrival time and frequency will be different than the strongly correlated signals in channels 1 and 3.
Now it simply becomes an engineering problem.
Let's look at this from a classical point of view.
Let's say Alice and Bob work at a baseball field. They line up 6 baseball players that's playing catch and they're separated by a barrier, so they can't see each other. The baseball can be either black or white. This doesn't matter to Bob and Alice when it comes to communicating though.
Bob and Alice determine that there's a high signal to noise ratio because the baseball's are going back and forth between players at a frequency and arrival time that shows they're strongly correlated.
So on Bob's side, there's 3 players catching the ball at a frequency and arrival time that shows high correlation. On Alice side, there's 3 players catching the ball at a frequency and arrival time that shows they're strongly correlated.
So now, Alice wants to send Bob a message and she can send Bob a different message by breaking the entanglement in 1 of the 3 channels.
She breaks entanglement in channel 1, lunch is at 12:00.
She breaks entanglement in channel 2, lunch is at 12:30.
She breaks entanglement in channel 3, lunch is at 1:00.
Alice can send this message to Bob faster than light.
Let's extrapolate it even further. Let's say Alice and her baseball players are on the sun and Bob and his players are on earth. The sun goes dark.
The people on earth will still get sunshine for 8 minutes on earth. Alice can tell Bob instantly and faster than light can reach the rest of the people on earth. So again I ask:
Why couldn't you detect entanglement breaking in one information channel while you still have strong correlations and signal to noise ratios in the subsequent channels?
The details matter a great deal. As neoholographic's previous thread led into more detail, that's where it fell apart, when neoholographic's scheme relied on a detector with properties that didn't exist and couldn't be built, and it became clear he didn't understand the details of what he's talking about.
originally posted by: mbkennel
Define specifically how to measure "signal to noise ratio" in this setup using information only available on one side, and specifically what you mean by entanglement breaking reducing signal to noise ratio. The details matter.
I don't see where you provided any details. You're kind of like the admiral who said "we can immobilize the enemy navy by simply draining all the water out of the oceans". When asked how to do that, he said: "don't bother me with details, any engineer worth his salt can figure out how to do that".
originally posted by: neoholographic
a reply to: mbkennel
Asked and answered.
In that signal to noise measurement, Bob is sending photons to Alice at the speed of light, where Alice can measure the signal to noise and this allows secure communication between Bob and Alice. But it's not faster than light.
if the sent and retained signals are truly entangled, they will be simultaneously strongly correlated in both arrival time and frequency. The much stronger initial correlation of the entangled beams allows reflected photons to be distinguished from background photons with a much higher signal to noise when they are “decoded” by recombining them with the retained signal. (The decoder is basically the reverse of the original entangler—a sort of “disentangler”—which only lets through the tiny residual correlation that matches the original entanglement.) Even though the entanglement doesn’t survive, a classical correlation survives that is stronger than would exist in the absence of entanglement in the first place. The enhancement in signal to noise is by a factor d, where d is the number of optical modes involved in the entanglement. In this way, the presence (or absence) of an object can be determined with far less light than a classical experiment would require.
There is also a patent that says an entire encyclopedia can be compressed to one word, and then restored...do you believe that one? You can't believe things are possible just because patents are granted...unless you're a fool.
originally posted by: The only 1 who knows the
It's been out under patent # Patent Number: 6,025,810 You can transmit a signal faster than the speed of light.
Patent No. 6,025,810, issued in February, is for an antenna that sends signals faster than the speed of light–impossible, if you believe the decades of science based on Einstein’s theory of relativity.
Patent 5,533,051, issued in 1996, covers a technique that purports to compress any data set by at least one bit without loss of information–a process that, if done recursively, could shrink the Encyclopaedia Britannica to a single word from which the original could be flawlessly reconstructed. The very idea is preposterous. Yet the patent office agonized for three years over the application–and in the end approved it.
Quantum illumination [2], which was first proposed by Seth Lloyd, is a method to enhance the probability of detecting a far away object. The problem with just shining light on a far away object and looking for any reflected photons is that little light will be reflected and any that does may be hard to see against a thermal background of light. Lloyd showed that using an entangled photon state to illuminate the object could significantly enhance the observer’s ability to distinguish the reflected light from the background. What is surprising is that this enhancement survives even when the noisy background completely destroys the entanglement in transit.
originally posted by: StargateSG7
a reply to: dragonridr
Will post links to papers in a bit...still on mobile comm and am not at work yet...in reply to your
earlier point, you cannot read the trapped Xenon atoms
themselves with a photon beam otherwise you
will break the quantum entanglement.
You can, however, use a photon beam to read
the current state of a gaseous or plasma medium
surrounding or encasing a quantum well that has been affected by any change in quantum spin-state of the trapped Xenon atom.
And vice versa it SEEMS to be possible to
use a pulsed beam to change the state or charge
of the gaseous or plasma quantum well encasement which then somehow CHANGES
the quantum spin-state of the trapped Xenon
atom WITHOUT breaking its entanglement
with the far away quantum well!
The reason why entanglement is left unbroken
during a "read cycle" of the encasement medium
is unclear and the reason why a change in the
outside quantum well encasement causes a change in quantum spin state (write cycle) without
breaking entanglement is also unclear. It is also unclear WHY 4 quantum wells are required to enact
a data communications stream. It seems each
pair of entangled quantum wells can be used
ONLY in a unidirectional manner. Trying to use
a pair of entangled quantum wells in a full duplex communications configuration BREAKS the quantum entanglemen, so a half duplex communications configuration and FOUR
quantum wells MUST be used to enable
two-way communications.
originally posted by: neoholographic
a reply to: dragonridr
What does any of this have to do with anything I've said?
Let me highlight a key portion that you must of skipped over.
Bob is now looking at these three channels who each have a high signal to noise ratio and are strongly correlated between arrival time and frequency. This can be determined beforehand because you're not sending information from Alice to Bob based on spin.
So Bob or Alice wouldn't see any randomness because they already know these things. It's really that simple. You're all over the place hoping something sticks but it has nothing to do with what I'm saying.
Again, it's not dependent on spin. It's not dependent on entanglement-non-entanglement.
Everything you're saying is basically a hodge podge of gobbledy gook.
Simply show why Alice and Bob couldn't communicate this way. In the set up listed in my last post, walk us through the same set up and show what will stop Alice from sending information to Bob in the way described in the last post.
originally posted by: neoholographic
In contrast, if the sent and retained signals are truly entangled, they will be simultaneously strongly correlated in both arrival time and frequency.
EXACTLY WHAT I SAID!!
If Alice and Bob have a 3 channel setup, and all three channels contain strongly correlated signals they will be strongly correlated in arrival time and frequency which will give you higher signal to noise.
originally posted by: StargateSG7
a reply to: dragonridr
Here some images and links to papers and articles
which give a background on Quantum Well Entanglement
and the Manufacturing of such Faster-Than-Light (FTL)