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Projected BCS states and spin Hamiltonians for the SO(n)_1 Wess-Zumino-Witten model

机译:针对SO(n)_1 Wess-Zumino-Witten模型的预计BCS状态和自旋哈密顿量

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We propose a class of projected BCS wave functions and derive their parent spin Hamiltonians. These wave functions can be formulated as infinite matrix product states constructed by chiral correlators of Majorana fermions. In one dimension, the spin Hamiltonians can be viewed as SO(n) generalizations of Haldane-Shastry models. We numerically compute the spin-spin correlation functions and Renyi entropies for n = 5 and 6. Together with the results for n = 3 and 4, we conclude that these states are critical and their low-energy effective theory is the SO(n)_1 Wess-Zumino-Witten model. In two dimensions, we show that the projected BCS states are chiral spin liquids, which support non-Abelian anyons for odd n and Abelian anyons for even n.%041103.1
机译:我们提出了一类预测的BCS波函数,并推导它们的父自旋哈密顿量。这些波函数可以公式化为由马约拉那费米子的手性相关器构成的无限矩阵乘积状态。在一个维度上,自旋哈密顿量可以看作是Haldane-Shastry模型的SO(n)推广。我们通过数值计算n = 5和6的自旋-自旋相关函数和Renyi熵。再结合n = 3和4的结果,我们得出结论,这些状态很关键,其低能效理论是SO(n) _1 Wess-Zumino-Witten模型。在两个维度上,我们表明,预测的BCS状态是手性自旋液体,它们支持奇数n的非阿贝尔正因和偶数n的阿贝尔正因。%041103.1

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