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Towards quantum computers?
Message
De
07/12/2005 22:39:20
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivie
 
 
À
07/12/2005 20:04:18
Information générale
Forum:
Windows
Catégorie:
Informatique en général
Divers
Thread ID:
01074010
Message ID:
01075999
Vues:
31
>Total spin must be preserved, and it was, ergo... hmmm... ergo what?
>
>>Manifestations of quantum mechanics always tend to be mysterious. If Bell's theorem or these experiments shed some new light on quantum effects, that would be unsettling, even without any violation of relativity. On the other hand, if Bell's theorem is meaningless, or the experiments are wrong, well that would be unsettling too. So it should come as no surprise that many people are disturbed by the Bell experiments, regardless of their significance!
>
>Well, there doesn't seem to be anyone out there saying that Aspect, Dalibard, and Roger's experiment was wrong.
>
>I wonder if João Magueijo's theory that the speed of light isn't constant might have something to say about all this.

It is claimed that this apparent instantaneous interconnectedness does not imply that matter, energy or information can actually be transferred instantaneously (or faster-than-light). However, I don't claim to understand the reasoning. I have done some reading, and it seems quite complicated.

Please note that when discussing "instantaneous communication", the question must be posed: "instantaneous for whom?" - in other words, what is instantaneous for one observer will not be instantaneous for another observer, moving at a different speed. This is explained in the Special Theory of Relativity, and the math is quite simple to understand.

It should be quite clear what this leads to: any instantaneous (or faster-than-light) communication (information or matter) (from the point of view of one user) would lead to sending information or matter to the past, from the point of view of another user. So, the two things - travelling or communicating faster than light on the one hand, and communicating information, or travelling, to the past, on the other hand, seem to be closely related. If one of the two is possible, or impossible, so is the other.

Since time travel (to the past) leads to all sorts of problems (which is sometimes summarized as that the "principle of casualty" or something is violated), time travel is often considered impossible, and, ergo, also faster-than-light travel.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
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