Some one please explain quantum decoherence to me?

[Braznor]

Pleaze!!!

 

[theMan]

http://en.wikipedia.org/wiki/Quantum_decoherence

 

[silverpig]

Simple version:

Imagine pairs figureskating. You have a man and a woman doing a dance together, and so long as there's no one else on the ice, they interact only with each other. They are "entangled".

Now, put a full hockey game on the same ice at the same time. In short order the guy will throw/spin his partner, and she'll get taken out in mid air with a bodycheck. Their entanglement is destroyed as they interact and equilibrate with their new environment.