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arXiv 2502.04876math-phmath.MP
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自旋玻色子模型的紫外重整化 I. 正规与2-幂零相互作用

Ultraviolet Renormalization of Spin Boson Models I. Normal and 2-Nilpotent Interactions

Benjamin Hinrichs, Jonas Lampart, Javier Valentín Martín

AI总结:

本文针对自旋玻色子模型及其旋转波近似中的紫外发散问题,在相互作用由正规矩阵或2-幂零矩阵给出的条件下,利用穿衣变换和内边界条件证明了最优重整化结果及正则化模型的范数预解收敛性。

摘要:

我们研究有限维量子力学系统与玻色量子场线性耦合的紫外问题,例如(多)自旋玻色子模型或其旋转波近似。如果系统在发射或吸收玻色子时的状态变化由一个正规矩阵或一个2-幂零矩阵给出——这正是前述例子中的情形——我们证明了一个最优重整化结果。作为补充,我们证明了适当正则化模型的范数预解收敛到重整化模型。我们的方法包括正规情形下的穿衣变换论证,以及2-幂零情形下适当的内边界条件。

英文摘要:

We study the ultraviolet problem for models of a finite-dimensional quantum mechanical system linearly coupled to a bosonic quantum field, such as the (many-)spin boson model or its rotating-wave approximation. If the state change of the system upon emission or absorption of a boson is either given by a normal matrix or by a 2-nilpotent one, which is the case for the previously named examples, we prove an optimal renormalization result. We complement it, by proving the norm resolvent convergence of appropriately regularized models to the renormalized one. Our method consists of a dressing transformation argument in the normal case and an appropriate interior boundary condition for the 2-nilpotent case.

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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