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Effective Theory For Quantum Spin System In Low Dimension - Beyond Long-Wavelength Limit

Ranjan Chaudhury·Samir K. Paul
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Abstract

An effective theory for quantum spin system in low dimension is constructed in the finite-q regime. It is shown that there are field configurations for which Wess-Zumino term contributes to the partition functions as topological term for ferromagnet as well as antiferromagnet in both one and two dimensional lattice,in contrast to the long wave length regime.

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Ranjan Chaudhury, Samir K. Paul. 2001-01-31. Effective Theory For Quantum Spin System In Low Dimension - Beyond Long-Wavelength Limit. https://doi.org/10.1142/s0217984902003713

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