Spin-wave wave function for quantum spin models
Spin-wave wave function for quantum spin models
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DOI：
10.1143/ptp.97.399
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发表时间：
1997-03-01
影响因子：
--
通讯作者：
Sorella, S
中科院分区：
文献类型：
--
作者：
Franjic, F;Sorella, S
We present a new approach to determine an accurate variational wave function for general quantum spin models, completely defined by a consistency requirement with the simple and well-known linear spin-wave expansion. With this wave function, it is also possible to obtain the correct behavior of the long distance correlation functions for the 1D S=1/2 antiferromagnet. In 2D the proposed spin-wave wave function represents an excellent approximation to the exact ground state of the S=1/2 XY model. We obtained accurate values for the correlation functions and discuss their physical relevance.
