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arXiv 0704.2433hep-lathep-th
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重叠Dirac算子的一个简单推导

A simple derivation of the Overlap Dirac Operator

C. D. Fosco, G. Torroba, H. Neuberger

摘要:

从δ函数时空亏损下的五维狄拉克作用量出发,导出了矢量型四维重叠狄拉克算子。通过在固定规范背景下积分出所有的费米子模,然后将局域模的贡献确定为一维以下算符的行列式,得到了有效算符,通过引入一个辅助的缺陷束缚费米子场并积分出原来的五维体场,定义了缺陷上的物理相关自由度.

英文摘要:

We derive the vector-like four dimensional overlap Dirac operator starting from a five dimensional Dirac action in the presence of a delta-function space-time defect. The effective operator is obtained by first integrating out all the fermionic modes in the fixed gauge background, and then identifying the contribution from the localized modes as the determinant of an operator in one dimension less. We define physically relevant degrees of freedom on the defect by introducing an auxiliary defect-bound fermion field and integrating out the original five dimensional bulk field.

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