Quantum Mechanics Solution Manual |
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© Leon van Dommelen |
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5.5.4.1 Solution complexsb-a
Question:
As an example of the orthonormality of the two-particle spin states, verify that is zero, so that and are indeed orthogonal. Do so by explicitly writing out the sums over and .
Answer:
The inner product is by definition
or writing out the second sum explicitly
or writing out the first sum also explicitly
and noting that 0 and 0, you see that all terms are zero.