Talk:Relativity and quantum mechanics

Particle Spin

The remark about spinning a particle is just wrong. One does not spin a particle. Spin simply is a property that particles have. It is not even spin in the sense that we normally consider (e.g., a baseball or a soccer ball); it is so called because the equation describing the property is practically identical to the equation describing the angular momentum of a spinning ball. All subatomic particles have a characteristic spin value, either an integer or a half-integer (1/2, 3/2 and so on). Particles which are entangled with respect to spin, will exhibit correlations (e.g., the direction of one may be "up" and the direcion of the other will be "down") during a given pair of measurements. After those measurements are done, nothing further can be said about the spin of those particles, and subsequent measurements in different directions (e.g. "left" and "right") will show no correlation whatsoever. Now, I am just a physics amateur; somebody who really knows this, please write a correct description of this phenomenon. --Swwright 20:14, 6 February 2007 (UTC)[reply]

The article "Relativity and quantum mechanics" now re-directs to Quantum gravity. The above comment is therefore now irrelevant. — SWWright^Talk 22:39, 11 May 2007 (UTC)[reply]

delete this article!

It is simply seriously flawed, and not much of it is correct. Besides, the article Quantum gravity already exists, is as far as i can tell (not very far, that is), accurate, and a lot of fun to read! So why bother about this one? - Saibod 12:15, 19 March 2007 (UTC)[reply]