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arXiv 1810.03313math-phmath.MP
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关于伪相对论性Nelson Hamilton算子的一种直接描述

On a Direct Description of Pseudorelativistic Nelson Hamiltonians

Julian Schmidt

摘要:

摘要边界条件(IBC)允许直接描述量子场论中一类紫外发散模型的区域和哈密顿量的作用。该方法最近被应用于模型,其中非相对论标量粒子线性耦合到一个量子化的领域,其中最著名的是纳尔逊模型。由于这种方法避免了使用紫外截止值,因此不需要重新归一化程序。在这里,我们将IBC方法扩展到与真实玻色子场相互作用的伪相对论标量粒子。我们通过抽象的边界条件,明确地描述他们的行动,这样的模型构建的哈密顿。此外,我们获得了他们的域的详细特征,并使连接到重正化技术。作为一个例子,我们将该方法应用于Nelson模型的两个相对论变体,这两个变体已经由J.P.Eckmann和A. D.斯隆分别于1970年和1974年。

英文摘要:

Abstract interior-boundary conditions (IBC's) allow for the direct description of the domain and the action of Hamiltonians for a certain class of ultraviolet-divergent models in Quantum Field Theory. The method was recently applied to models where nonrelativistic scalar particles are linearly coupled to a quantised field, the best known of which is the Nelson model. Since this approach avoids the use of ultraviolet-cutoffs, there is no need for a renormalisation procedure. Here, we extend the IBC method to pseudorelativistic scalar particles that interact with a real bosonic field. We construct the Hamiltonians for such models via abstract boundary conditions, describing their action explicitly. In addition, we obtain a detailed characterisation of their domain and make the connection to renormalisation techniques. As an example, we apply the method to two relativistic variants of Nelson's model, which have been renormalised for the first time by J. P. Eckmann and A. D. Sloan in 1970 and 1974, respectively.

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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