[請益] 關於一些名詞及符號不懂
我現在在念這篇Paper
http://arxiv.org/abs/cond-mat/9502060
我想請問的是
什麼是particle particle channel??
還有為什麼我可以把triplet 的field operator 寫成f(p)C(p+q)+上C(-q)+上
我知道(C(p+q)+上)和(C(-q)+上)是甚麼意思
但我卻不明白這到底跟triplet有甚麼關係
這個卡很久了
可以請高手幫我解釋一下嗎
謝謝!!
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