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arXiv 0711.4101hep-th
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边界束缚态Dirichlet sine-Gordon模型的NLIE

NLIE of Dirichlet sine-Gordon Model for Boundary Bound States

Changrim Ahn, Zoltan Bajnok, Laszlo Palla, Francesco Ravanini

摘要:

研究了有限尺寸带上sine-Gordon模型在Dirichlet边界条件下的边界束缚态。为此,我们从Saleur和Skorik发现的具有边界虚根的非均匀XXZ自旋1/2链的Bethe方程出发,导出了边界激发态的非线性积分方程。以大体积(IR)的限制,我们计算边界能量,边界反射因子和边界Luscher修正和比较的Dirichlet正弦戈登模型首先考虑Dorey和Mattsson的激发边界状态。我们还考虑了短距离的限制,并与紫外共形场论的红外散射数据。

英文摘要:

We investigate boundary bound states of sine-Gordon model on the finite-size strip with Dirichlet boundary conditions. For the purpose we derive the nonlinear integral equation (NLIE) for the boundary excited states from the Bethe ansatz equation of the inhomogeneous XXZ spin 1/2 chain with boundary imaginary roots discovered by Saleur and Skorik. Taking a large volume (IR) limit we calculate boundary energies, boundary reflection factors and boundary Luscher corrections and compare with the excited boundary states of the Dirichlet sine-Gordon model first considered by Dorey and Mattsson. We also consider the short distance limit and relate the IR scattering data with that of the UV conformal field theory.

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