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arXiv 2004.00419math-phmath.MPmath.OA
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Minkowski空间中因果费米子系统的局部代数

Local Algebras for Causal Fermion Systems in Minkowski Space

Felix Finster, Marco Oppio

摘要:

在因果费米子系统理论中引入了局部代数的概念。以Minkowski空间中正则化Dirac海真空为例,研究了它们的性质.给出了它们的对易关系,并讨论了它们与正则对易关系的区别。结果表明,与柯西曲面相关联的时空点算子满足时间片公理。作为Hegerfeldt定理的一个推论,证明了开集中算子生成的代数是不可约的。通过分析去除正则化后代数中算子在极限下的期望值,恢复了光锥结构。研究表明,每个时空点算子都与远离其零锥的局部化代数可交换,直到涉及正则化长度的小修正。

英文摘要:

A notion of local algebras is introduced in the theory of causal fermion systems. Their properties are studied in the example of the regularized Dirac sea vacuum in Minkowski space. The commutation relations are worked out, and the differences to the canonical commutation relations are discussed. It is shown that the spacetime point operators associated to a Cauchy surface satisfy a time slice axiom. It is proven that the algebra generated by operators in an open set is irreducible as a consequence of Hegerfeldt's theorem. The light cone structure is recovered by analyzing expectation values of the operators in the algebra in the limit when the regularization is removed. It is shown that every spacetime point operator commutes with the algebras localized away from its null cone, up to small corrections involving the regularization length.

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