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arXiv 1906.02161hep-th
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三维时空中的非相对论对称性与Nappi-Witten代数

Non-relativistic symmetries in three space-time dimensions and the Nappi-Witten algebra

Diego M. Peñafiel, Patricio Salgado-Rebolledo

摘要:

我们证明了2+1维的扩展Bargmann代数和Newton-Hooke代数可以作为Nappi-Witten代数的扩展而得到。这个结果可以推广到两个无限族的非相对论对称性,包括麦克斯韦奇异巴格曼对称性、广义牛顿-胡克对称性和Hietarinta对偶。在每一种情况下,Nappi-Witten代数上的不变双线性形式都会导致扩展代数上的不变张量,从而可以构建相应的Chern-Simons引力理论。

英文摘要:

We show that the Extended Bargmann and Newton-Hooke algebras in 2+1 dimensions can be obtained as expansions of the Nappi-Witten algebra. The result can be generalized to obtain two infinite families of non-relativistic symmetries, which include the Maxwellian Exotic Bargmann symmetry, its generalized Newton-Hooke counterpart, and its Hietarinta dual. In each case, the invariant bilinear form on the Nappi-Witten algebra leads to the invariant tensor on the expanded algebra, allowing one to construct the corresponding Chern-Simons gravity theory.

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