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arXiv 2103.00353hep-thgr-qc
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Minkowski非定域量子场论的非么正性

Non-unitarity of Minkowskian non-local quantum field theories

Fabio Briscese, Leonardo Modesto

摘要:

我们证明了Minkowski非定域量子场论不是么正的。我们考虑一个简单的单圈图的标量非局域场,并表明,相应的复振幅的虚部不是由Cutkosky规则,实际上这个图违反了幺正性条件。我们比较了这个结果与欧几里德非局部标量场的情况下,已被证明满足Cutkosky规则,我们清楚地确定的闵可夫斯基理论的么正性打破的原因。

英文摘要:

We show that Minkowskian non-local quantum field theories are not unitary. We consider a simple one loop diagram for a scalar non-local field and show that the imaginary part of the corresponding complex amplitude is not given by Cutkosky rules, indeed this diagram violates the unitarity condition. We compare this result with the case of an Euclidean non-local scalar field, that has been shown to satisfy the Cutkosky rules, and we clearly identify the reason of the breaking of unitarity of the Minkowskian theory.

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