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arXiv 1003.3190hep-thgr-qcmath-phmath.MP
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弯曲非对易时空上的场论

Field Theory on Curved Noncommutative Spacetimes

Alexander Schenkel, Christoph F. Uhlemann

摘要:

我们研究非对易弯曲时空上的经典标量场理论。遵循Wess等人[Classical量子引力22(2005),3511 and Classical量子引力23(2006),1883]的方法,我们用(阿贝尔)Drinfel'd扭曲和相关的 *-乘积和 *-微分几何描述非对易时空。特别是,我们允许位置相关的非交换性,并不限制自己的Moyal-Weyl变形。构造了非对易弯曲时空上实标量场的作用泛函,并导出了相应的变形波动方程。我们提供了明确的例子变形Klein-Gordon运营商的非对易闵可夫斯基,德西特,史瓦西和兰德尔Sundrum时空,解决非对易爱因斯坦方程。我们研究了变形格林函数的构造,并提供了一个图形化的微扰计算方法。我们的例子中的格林函数的领先的非交换修正。

英文摘要:

We study classical scalar field theories on noncommutative curved spacetimes. Following the approach of Wess et al. [Classical Quantum Gravity 22 (2005), 3511 and Classical Quantum Gravity 23 (2006), 1883], we describe noncommutative spacetimes by using (Abelian) Drinfel'd twists and the associated *-products and *-differential geometry. In particular, we allow for position dependent noncommutativity and do not restrict ourselves to the Moyal-Weyl deformation. We construct action functionals for real scalar fields on noncommutative curved spacetimes, and derive the corresponding deformed wave equations. We provide explicit examples of deformed Klein-Gordon operators for noncommutative Minkowski, de Sitter, Schwarzschild and Randall-Sundrum spacetimes, which solve the noncommutative Einstein equations. We study the construction of deformed Green's functions and provide a diagrammatic approach for their perturbative calculation. The leading noncommutative corrections to the Green's functions for our examples are derived.

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