- #1
acxler8
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I'm new to this, so I can only express and understand simple language (as far as quantum mechanics is concerned). Please try to keep the replies as less technical as possible.
Consider a simple example: Two particles ( A and B ) are ejected in opposite directions, entangled in a way such that their spins along any axis are along opposite directions. Consider only spins along x and y axes for this.
When the x-spin of A is measured, according to the uncertainty principle, info about the y-spin of B is lost, as the x-spin of B is now known. So if the y-spin is measured after, it can have ANY possible value.
NOW THE PROBLEM : If the x-spin of A, and y-spin of B are SIMULTANEOUSLY measured, wouldn't we get to know both the x and y spins of both particles, thereby violating the uncertainty principle?
(And if this kind of simultaneous measurement is impossible, how is it so?)
Consider a simple example: Two particles ( A and B ) are ejected in opposite directions, entangled in a way such that their spins along any axis are along opposite directions. Consider only spins along x and y axes for this.
When the x-spin of A is measured, according to the uncertainty principle, info about the y-spin of B is lost, as the x-spin of B is now known. So if the y-spin is measured after, it can have ANY possible value.
NOW THE PROBLEM : If the x-spin of A, and y-spin of B are SIMULTANEOUSLY measured, wouldn't we get to know both the x and y spins of both particles, thereby violating the uncertainty principle?
(And if this kind of simultaneous measurement is impossible, how is it so?)