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arXiv math-ph/0501032math-phmath.MP
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具有不定度量的非平凡模型

Nontrivial models with indefinite metric

S. Albeverio, H. Gottschalk

摘要:

在不定度规的量子场论框架下,在Minkowski时空的任意维$d$中非平凡散射的量子场模型的非微扰构造比在正度规的情况下简单得多.特别地,在物理维度$d=4$中存在许多解,其中到目前为止还不知道正度量解。在这里,我们回顾,为什么会这样,我们讨论了一些例子,从非高斯白噪声驱动的欧氏协变随机偏微分方程(SPDE)的解决方案的解析延拓。

英文摘要:

The non perturbative construction of quantum field models with nontrivial scattering in arbitrary dimension $d$ of the underlying Minkowski space-time is much more simple in the framework of quantum field theory with indefinite metric than in the positive metric case. In particular, there exist a number of solutions in the physical dimension $d=4$, where up to now no positive metric solutions are known. Here we review, why this is so, and we discuss some examples obtained by analytic continuation from the solutions of Euclidean covariant stochastic partial differential equations (SPDEs) driven by non-Gaussian white noise.

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