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arXiv 1005.4366math-phcond-mat.othermath.MPmath.PRquant-ph
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无质量自旋玻色子模型的基态能量

The Ground State Energy of The Massless Spin-Boson Model

Abdelmalek Abdesselam

摘要:

本文给出了无质量自旋玻色子模型的基态能量在耦合参数下的幂级数的组合展开式。我们的方法使用的技术集团展开的建设性量子场论和作为出发点的功能积分表示和它的减少到一个伊辛模型的实线上的长程相互作用。我们证明了扩展的解析性,并提供了收敛半径的显式下界。我们不需要多尺度或重整化群分析。指示到环擦除随机游走的连接。

英文摘要:

We provide an explicit combinatorial expansion for the ground state energy of the massless spin-Boson model as a power series in the coupling parameter. Our method uses the technique of cluster expansion in constructive quantum field theory and takes as a starting point the functional integral representation and its reduction to an Ising model on the real line with long range interactions. We prove the analyticity of our expansion and provide an explicit lower bound on the radius of convergence. We do not need multiscale nor renormalization group analysis. A connection to the loop-erased random walk is indicated.

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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