LQ35 - Name_ Date_ PHYS 360 Lecture...

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Unformatted text preview: Name:__________________________________________ Date:__________________________ PHYS 360 Lecture Question #35 Consider the following four wave functions for two particles. Which ones change sign if you interchange the two particles? ψ (r1 , r2 ) = A [ψ a (r1 )ψ b (r2 ) + ψ b (r1 )ψ a (r2 )] ↑1 ↓2 + ↓1 ↑2 ψ (r1 , r2 ) = A [ψ a (r1 )ψ b (r2 ) − ψ b (r1 )ψ a ψ (r1 , r2 ) = A [ψ a (r1 )ψ b (r2 ) + ψ b (r1 )ψ a ψ (r1 , r2 ) = A [ψ a (r1 )ψ b (r2 ) − ψ b (r1 )ψ a { (r )]{↑ ↓ (r )]{↑ ↓ (r )]{↑ ↓ 2 2 2 1 1 1 2 2 2 } +↓ ↑ } −↓ ↑ } −↓ ↑ } 1 1 1 2 2 2 ...
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This note was uploaded on 04/23/2011 for the course PHYS 360 taught by Professor Durbin,stephen during the Spring '11 term at Purdue.

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