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arXiv 0709.4600hep-th
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正则非对易时空的扭曲Hopf对称性与非纯Boost原理

Twisted Hopf symmetries of canonical noncommutative spacetimes and the no-pure-boost principle

Giovanni Amelino-Camelia, Fabio Briscese, Giulia Gubitosi, Antonino Marciano, Pierre Martinetti, Flavio Mercati

摘要:

我们研究了非对易正则时空的扭曲Hopf代数对称性,其中时空坐标的交换子为[x^{mu},x^{nu}]=i θ ^{mu nu},θ ^{mu nu}与非对易正则时空无关(也与坐标无关)。我们发现,有必要在变换参数和时空坐标之间引入非平凡的交换子,并且这些交换子的形式意味着所有的对称变换必须包括平移分量。我们表明,与我们的非交换变换参数的对称性的Noether分析是简单的,我们比较我们的典型的非交换性的结果与结构的保守电荷和“无纯提升”的要求,在以前的研究kappa-Minkowski非交换性。我们还验证了,虽然在中间阶段的分析,我们找到的条款,依赖于在建立外尔映射的顺序约定,保守的费用的最终结果是令人放心的外尔映射的选择和(相应的选择)星产品的独立。

英文摘要:

We study the twisted-Hopf-algebra symmetries of observer-independent canonical spacetime noncommutativity, for which the commutators of the spacetime coordinates take the form [x^{mu},x^{nu}]=i theta^{mu nu} with observer-independent (and coordinate-independent) theta^{mu nu}. We find that it is necessary to introduce nontrivial commutators between transformation parameters and spacetime coordinates, and that the form of these commutators implies that all symmetry transformations must include a translation component. We show that with our noncommutative transformation parameters the Noether analysis of the symmetries is straightforward, and we compare our canonical-noncommutativity results with the structure of the conserved charges and the "no-pure-boost" requirement derived in a previous study of kappa-Minkowski noncommutativity. We also verify that, while at intermediate stages of the analysis we do find terms that depend on the ordering convention adopted in setting up the Weyl map, the final result for the conserved charges is reassuringly independent of the choice of Weyl map and (the corresponding choice of) star product.

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