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arXiv 1104.0225hep-th
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关于边界截断共形空间方法的重整化群

On the renormalisation group for the boundary Truncated Conformal Space Approach

Gerard Watts

摘要:

本文继续研究摄动边界共形场论的截断共形空间方法。这种微扰理论的方法受到耦合常数的重正化和哈密顿量的乘法重正化的影响。我们展示了如何这两种效果可以预测的物理和数学参数,并证明他们是正确的,在TCSA系统中的所有状态的领导秩序。我们使用TCSA应用于三临界伊辛模型和杨-李模型检查这些结果。我们还研究了TCSA的一个不相关的(non-renormalisable)扰动,并发现,虽然收敛的耦合常数和能量尺度是有问题的,renormalised和重新标度的频谱仍然是一个非常好的适合的确切结果,我们发现一个数值之间的关系的IR和UV耦合描述一个特定的流。最后,我们研究了TCSA的大耦合行为,并表明它准确地包含几个不同的固定点。

英文摘要:

In this paper we continue the study of the truncated conformal space approach to perturbed boundary conformal field theories. This approach to perturbation theory suffers from a renormalisation of the coupling constant and a multiplicative renormalisation of the Hamiltonian. We show how these two effects can be predicted by both physical and mathematical arguments and prove that they are correct to leading order for all states in the TCSA system. We check these results using the TCSA applied to the tri-critical Ising model and the Yang-Lee model. We also study the TCSA of an irrelevant (non-renormalisable) perturbation and find that, while the convergence of the coupling constant and energy scales are problematic, the renormalised and rescaled spectrum remain a very good fit to the exact result, and we find a numerical relationship between the IR and UV couplings describing a particular flow. Finally we study the large coupling behaviour of TCSA and show that it accurately encompasses several different fixed points.

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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