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Manfred comments on Open thread, August 5-11, 2013 - Less Wrong Discussion

3 Post author: David_Gerard 05 August 2013 06:50AM

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Comment author: Manfred 05 August 2013 09:14:21PM 1 point [-]

|up, up> + |down, down> is perfectly oriented in the X direction.

Nay. (|up>+|down>)(|up>+|down>) is oriented in the X-direction.

Comment author: Luke_A_Somers 05 August 2013 09:41:45PM 0 points [-]

Hmmm... Yes.

I'm used to people forgetting that every single-particle spinor maps onto a single direction. Then I forget spinor addition. Oops.

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