# Something about Entanglement

1. Apr 6, 2004

### Antonio Lao

What I say or do here and now can affect someone somewhere sometime, is this the same as quantum entanglement?

If no one doesn't say or does here and now then nothing will ever happen in the future. Someone can only do or say something only if he or she is alive. But what someone does or says in the past can still be affecting everything in the present. So entanglement is same as causality with a built-in probability.

This probability come about because of reaction from the effect to the cause of the action. When the reaction is equal in intensity to the causal action, the probability of the original action becomes zero. When there is no reaction to any action, the probability of the action becomes 1.

Last edited: Apr 6, 2004
2. Apr 6, 2004

### matt grime

That isn't qunatum entanglement, so don't worry.

3. Apr 6, 2004

### Antonio Lao

Anybody has a good idea what quantum entanglement is all about?

I am still reading the book by Amir D. Aczel on the same topic.

4. Apr 6, 2004

### Pergatory

Not that I'm trying to postulate here, but how do we know that they do not have the same underlying forces? We do not understand how quantum entanglement works. The idea of actions in one local space/time having consequences in a seemingly separate space/time defies our explanation of physics entirely. Perhaps the entire system of causality needs reworking.

...then again, perhaps there's an unobservable particle that has infinite velocity which transmits the information between the entangled particles, and no further relationships can be deduced.

5. Apr 6, 2004

### matt grime

Quantum entanglement states , if I remember the brief article I read about it, that if two quantum particles interact, then their future states are linked, or words to that effect. So the original idea that, say, if Antonio says 'apples are red' affects the outcome of the US elections in November isn't the same situation. Entanglement isn't about what 'can' happen it explains what does happen (though I can't explain why *it* happens).

6. Apr 8, 2004

### Antonio Lao

Distance is not a factor in a quantum entanglement interaction. Therefore the spacetime structure has its space components equal to zero. The time component can also be shown to be zero. This implies that entangled events only happens at the singularity (the birth of the universe) and this only happens once for our particular universe. All photons were entangled at the beginning of time and all things were also entangled at that time.

7. Apr 12, 2004

### Antonio Lao

For a complete description of entanglement, the properties of polarization, spin, momentum (mass and velocity), position, direction of propagation, and other unique properties of a quantum particle must all be accounted for.

8. Apr 13, 2004

### Antonio Lao

Just finished reading a book on entanglement. Entanglement, as I undestood it, implies a property of "no choice." This choice is the state of the entangled objects. If someone perform an experiment to find the spin of an entangled photon, the expeimenter can choose an arbitrary direction for this particular experiment but cannot choose the outcome for the state that the photon will take. Once the photon takes a state of spin, the other entangled photon (light-years away) instantly takes the "opposite" state of spin.

The reality of entanglement seems to indirectly imply the compositeness of photons.