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arXiv 1004.0789hep-th
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边界条件与有效理论的一致性

Boundary conditions and consistency of effective theories

Janos Polonyi, Alicja Siwek

摘要:

有效理论在被消除的重粒子模的尺度上是非定域的。表示这种非局部性的梯度展开必须被截断以具有可处理的模型。这一步导致自由度的扩散,使得有效理论的状态识别变得重要。此外,它在Fock空间中产生不定度量,这反过来又危及有效理论的酉性。结果表明,施加一个广义KMS边界条件的新的自由度导致反射积极的广泛的一类欧几里德有效的理论,从而这些导致可接受的理论时,扩展到实时。

英文摘要:

Effective theories are non-local at the scale of the eliminated heavy particles modes. The gradient expansion which represents such non-locality must be truncated to have treatable models. This step leads to the proliferation of the degrees of freedom which renders the identification of the states of the effective theory nontrivial. Furthermore it generates non-definite metric in the Fock space which in turn endangers the unitarity of the effective theory. It is shown that imposing a generalized KMS boundary conditions for the new degrees of freedom leads to reflection positivity for a wide class of Euclidean effective theories, thereby these lead to acceptable theories when extended to real time.

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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