# Quick question on ensembles of pure states

Hi folks,

I just have a question concerning whether it is possible to produce an ensemble of individual electrons in pure single-particle spin states. I'm assuming it is possible, but sometimes one hears that strictly speaking all electrons are entangled with one another, which would mean that they are not individually in a pure state -- so I"m a bit confused about this! I'd also like to hear how it is possible to produce such an ensemble (if it is indeed possible) physically.

Thanks very much!

jfizzix