It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
The basic setup goes like this:
Both pairs of photons are entangled, so that the two particles in the first set are entangled with each other, and the two particles in the second set are entangled with each other. Then, one photon from each pair is sent to a person named Victor. Of the two particles that are left behind, one goes to Bob, and the other goes to Alice.
But now, Victor has control over Alice and Bob's particles. If he decides to entangle the two photons he has, then Alice and Bob's photons, each entangled with one of Victor's, also become entangled with each other. And Victor can choose to take this action at any time, even after Bob and Alice may have measured, changed or destroyed their photons.
"The fantastic new thing is that this decision to entangle two photons can be done at a much later time," said research co-author Anton Zeilinger, also of the University of Vienna. "They may no longer exist."
"The idea is to create two particle pairs, send one to one computer, the other to another," Zeilinger said."Then if these two photons are entangled, the computers could use them to exchange information."
Perspective has an informational component to it that hasn't been explored...if particle entanglement functions similarly to this "tube" then the idea is only limited by the ability to detect the contrasting particle 10 light years away to decipher the message. We could potentially manipulate large groups of particles to make it easier to read...kinda like large print books =)
Lets say you wanted to send a binary message "01001000 01101001" (hi)10 light years away.
Lets say "0" = counter rotation "1" = clockwise rotation and the space between digits = stop rotation.
the message would be sent as: "counter(0)>stop>clock(1)>stop>counter(0)>stop>counter(0)>stop>clock(1)>stop>counter(0)>stop>counter(0)>stop>counter(0)etc...
I'm sure the process could be cleaned up and made more efficient than this but the general idea remains the same.
reply to post by OccamsRazor04
This makes no sense.
It wouldn't take 40 years for any cipher to travel through space-time. The sequence of correlated/uncorrelated is predetermined by Victor, Alice and Bob. You can test this right now with atomic clocks and a random number generator.
You can set this up where Victor, Bob and Alice are 1 mile apart. Scientist have already clocked entanglement using atomic clocks. You determine the speed that light will carry a message from Victor to Alice and Bob. You then set up three words that could be sent.
101100 = dog
100110 = cat
110001 = rat
You then have a random number generator determine which word will be sent. You also have atomic clocks set up with Alice and Bob and one with Victor.
To determine which word is being sent, you just need to check for quantum correlation which = 1 and when there's no quantum correlation it = 0.
But now, Victor has control over Alice and Bob's particles.
Motivated by the question, which kind of physical interactions and processes are needed for the production of quantum entanglement, Peres has put forward the radical idea of delayed-choice entanglement swapping. There, entanglement can be “produced a posteriori, after the entangled particles have been measured and may no longer exist.” In this work we report the first realization of Peres’ gedanken experiment. Using four photons, we can actively delay the choice of measurement – implemented via a high-speed tunable bipartite state analyzer and a quantum random number generator – on two of the photons into the time-like future of the registration of the other two photons. This effectively projects the two already registered photons onto one definite of two mutually exclusive quantum states in which either the photons are entangled (quantum correlations) or separable (classical correlations). This can also be viewed as “quantum steering into the past”.
In the present article, I propose an even more paradoxical experiment, where entanglement is produced a posteriori , after the entangled particles have been measured and may no longer exist.
A thought experiment or Gedankenexperiment (from German) considers some hypothesis, theory, or principle for the purpose of thinking through its consequences.
In the entanglement swapping 1-3 procedure, two pairs of entangled photons are produced, and one
photon from each pair is sent to Victor. The two other photons from each pair are sent to Alice and Bob,
respectively. If Victor projects his two photons onto an entangled state, Alice’s and Bob’s photons are entangled although they have never interacted or shared any common past. What might be considered as even more 4,5 puzzling is Peres’ idea of “delayed-choice for entanglement swapping” . In this gedanken experiment, Victor is free to choose either to project his two photons onto an entangled state and thus project Alice’s and Bob’s photons onto an entangled state, or to measure them individually and then project Alice’s and Bob’s photons onto a separable state. If Alice and Bob measure their photons’ polarization states before Victor makes his choice and projects his two photons either onto an entangled state or onto a separable state, it implies that whether their two photons are entangled (showing quantum correlations) or separable (showing classical correlations) can be defined after they have been measured.
Our experiment demonstrates entanglement-separability duality in a delayed-choice configuration via entanglement swapping for the first time. This means that it is possible to freely and a posteriori decide which type of mutually exclusive correlations two already earlier measured particles have. They can either show quantum correlations (due to entanglement) or purely classical correlations (stemming from a separable state).
"In our experiment, the primary events are the polarization measurements of photons 1 and 4 by Alice and Bob. They keep their data sets for future evaluation. Each of these data sets by itself and their correlations are completely random and show no structure whatsoever."
Each of these data sets by itself and their correlations are completely random and show no structure whatsoever.