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应用高斯波泛函方法,研究了sine-Gordon模型的基态、单粒子态和两粒子态。在Cole-man临界点附近,sine-Gordon系统趋于零质量玻色子系统,从而具有共形对称性。本文同时证明,当重整化质量有限时,在两粒子态中存在束缚态。With a general Gaussian wave functional, we study the ground states, one particle states, and two particle states of the sine-Gordon model. At the Coleman's critical point, the sine-Gordon system tends to a system of massless free bosons which possesses conformal symmetry. We also show that there exist bound states in two particle states as long as the renormalized mass remains finite.
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