Haldane Gap in One-Dimensional Spin Chains |
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| Authors: | Su-Qing CHEN Guang-Jiong NI Ping SUN |
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| Affiliation: | Physics Department, Fudan University, Shanghai 200433, China |
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| Abstract: | One-dimensional antiferromagnetic spin chains (S = 1) are quantized by means of the Gaus sian effective potential method for the O(3) nonlinear a model. The critical line-separating the missive phase with Haldane gap and massless phase is found in an analytic form. The spin correlation function is discussed via the sine-Gordon formulation as well. |
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