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Thursday, May 7, 2015

Exploring Quantum Physics - Question 2

Question:

What is [^L1,ˆrˆp]

Solution:

With the identity and the experience deriving those, it is not complicated anymore.

[^L1,ˆrˆp]=[^L1,^xa^pa]=[^L1,^xa]^pa+^xa[^L1,^pa]=(ϵ1ab^xb)^pa+^xa(ϵ1ab^pb)=ϵ1ab(^xb^pa+^xa^pb)=^x3^p2+^x2^p3^x2^p3^x3^p2=0

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