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arXiv 0912.2252hep-thgr-qcmath-phmath.MP
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一类非对易弯曲时空上量子场论的代数方法

Algebraic approach to quantum field theory on a class of noncommutative curved spacetimes

Thorsten Ohl, Alexander Schenkel

摘要:

本文研究了一类非对易流形上的自由实标量场的量子化问题,该量子化是利用三角Drinfel'd扭曲通过形式变形量子化得到的。我们构造了变形的二次作用泛函,并计算了相应的运动方程算子。用形式幂级数形式求出了变形运动方程的格林算符和基本解。它表明,使用变形的基本解,我们可以定义变形的 *-代数的场观测量,这在一般情况下取决于时空变形参数。这种依赖性在Killing形变的特殊情况下是不存在的,特别是闵可夫斯基时空的Moyal-Weyl形变。

英文摘要:

In this article we study the quantization of a free real scalar field on a class of noncommutative manifolds, obtained via formal deformation quantization using triangular Drinfel'd twists. We construct deformed quadratic action functionals and compute the corresponding equation of motion operators. The Green's operators and the fundamental solution of the deformed equation of motion are obtained in terms of formal power series. It is shown that, using the deformed fundamental solution, we can define deformed *-algebras of field observables, which in general depend on the spacetime deformation parameter. This dependence is absent in the special case of Killing deformations, which include in particular the Moyal-Weyl deformation of the Minkowski spacetime.

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