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Angular momentum algebra

We note that, using the anti-commuting properties of the creation operators, we obtain Nabmambjamajbmb|JM|Φab=Nabmambjamajbmb|JM|Φba. Furthermore, using the property of the Clebsch-Gordan coefficient jamajbmb|JM>=(1)ja+jbJjbmbjama|JM, which can be used to show that |(jbja)JM={abaa}JM|16O=Nabmambjbmbjama|JM|Φba, is equal to |(jbja)JM=(1)ja+jbJ+1|(jajb)JM.