On induced CPT-odd Chern-Simons terms in the 3+1 effective action
On induced CPT-odd Chern-Simons terms in the 3+1 effective action
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关于 3 1 有效作用中诱导 CPT 奇 Chern-Simons 项
DOI：
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发表时间：
1999
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通讯作者：
G. Volovik
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作者：
G. Volovik
本文最初被指定为 R. Jackiw 和 V. A. Kostelecký, Phys 对该论文的评论。莱特牧师。 82、3572（1999）。它给出了一个费米子系统的例子，其中有效作用中的 CPT 奇陈-西蒙斯项是由手性费米子明确诱导的：超流体 3He-A。在这个系统中，洛伦兹和规范不变性在高能量下都被违反，但系统超出截止的行为是已知的。这允许人们构造一种 CPT 奇动作，该动作结合了传统的 3+1 CS 项和 G. E. Volovik 和 A. Vilenkin 讨论的混合轴向重力 CS 项，http://xxx.lanl.gov/abs/hep-ph/9905460。已通过旋转 3He-A 实验观察到 CS 项对有效规范场动力学的影响。
This paper was originally designated as a Comment on the paper by R. Jackiw and V. A. Kostelecký, Phys. Rev. Lett. 82, 3572 (1999). It gives an example of a fermionic system in which the CPT-odd Chern-Simons terms in the effective action are unambiguously induced by chiral fermions: superfluid 3He-A. In this system the Lorentz and gauge invariances are both violated at high energy, but the behavior of the system beyond the cutoff is known. This allows one to construct a CPT-odd action which combines the conventional 3+1 CS term and the mixed axial-gravitational CS term discussed by G. E. Volovik and A. Vilenkin, http://xxx.lanl.gov/abs/hep-ph/9905460. The influence of the CS term on the dynamics of the effective gauge field has been observed experimentally in rotating 3He-A.