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arXiv hep-th/0205193hep-th
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时空非对易场论中的么正性

Unitarity in space-time noncommutative field theories

Chaiho Rim, Jae Hyung Yee

摘要:

在非对易场论中,传统的观点认为,当非对易坐标中包含时间时,幺正性与微扰分析是不相容的。然而,正如Bahns等最近提出的,问题的根源在于时间序积的定义不恰当。本文利用Heisenberg图像中的场方程和时间序的适当定义,为非对易$ϕ^p$标量场理论构造了S-矩阵的泛函形式.这个S-矩阵显然是酉的。利用自由谱(Wightmann)函数作为自由场传播子,证明了扰动服从么正性,并给出了1+1维非对易非线性薛定谔模型的精确两粒子散射振幅.

英文摘要:

In non-commutative field theories conventional wisdom is that the unitarity is non-compatible with the perturbation analysis when time is involved in the non-commutative coordinates. However, as suggested by Bahns et.al. recently, the root of the problem lies in the improper definition of the time-ordered product. In this article, functional formalism of S-matrix is explicitly constructed for the non-commutative $ϕ^p$ scalar field theory using the field equation in the Heisenberg picture and proper definition of time-ordering. This S-matrix is manifestly unitary. Using the free spectral (Wightmann) function as the free field propagator, we demonstrate the perturbation obeys the unitarity, and present the exact two particle scattering amplitude for 1+1 dimensional non-commutative nonlinear Schrödinger model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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