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arXiv 1107.2216hep-th
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单圈扭结质量位移的计算方法

One-loop kink mass shifts: a computational approach

Alberto Alonso-Izquierdo, Juan Mateos Guilarte

摘要:

本文发展了一种计算一般(1+1)维单分量标量场理论模型中扭结质量的单圈量子修正的方法。该程序使用广义zeta函数正则化方法的帮助下,通过梅林变换的热函数的Gilkey-de Witt渐近展开。我们发现一个公式的单圈扭结质量转移,只依赖于一部分的能量密度没有字段的衍生物,通过一个符号的软件算法,自动化的计算进行评估。改进的算法相对于早期的工作,在这个问题上已被测试的正弦戈登和$λ(ϕ)_2^4$模型。计算了sG孤子和$λ(ϕ^4)_2$扭结质量的量子修正,其相对误差分别为0.00006%和0.00007%。之后,将该算法应用于其他模型。特别是,一个有趣的单参数家庭的双sine-Gordon模型之间的普通sine-Gordon和重新缩放sine-Gordon模型插值解决。另一个单参数的家庭,在这种情况下的$ϕ^6$模型,进行了分析。我们的程序的主要优点是它的通用性:它可以适用于几乎任何类型的相对论性标量场模型支持扭结。

英文摘要:

In this paper we develop a procedure to compute the one-loop quantum correction to the kink masses in generic (1+1)-dimensional one-component scalar field theoretical models. The procedure uses the generalized zeta function regularization method helped by the Gilkey-de Witt asymptotic expansion of the heat function via Mellin's transform. We find a formula for the one-loop kink mass shift that depends only on the part of the energy density with no field derivatives, evaluated by means of a symbolic software algorithm that automates the computation. The improved algorithm with respect to earlier work in this subject has been tested in the sine-Gordon and $λ(ϕ)_2^4$ models. The quantum corrections of the sG-soliton and $λ(ϕ^4)_2$-kink masses have been estimated with a relative error of 0.00006% and 0.00007% respectively. Thereafter, the algorithm is applied to other models. In particular, an interesting one-parametric family of double sine-Gordon models interpolating between the ordinary sine-Gordon and a re-scaled sine-Gordon model is addressed. Another one-parametric family, in this case of $ϕ^6$ models, is analyzed. The main virtue of our procedure is its versatility: it can be applied to practically any type of relativistic scalar field models supporting kinks.

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