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首页> 外文期刊>Physical review >Multiparticle spectral properties in the transverse field Ising model by continuous unitary transformations
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Multiparticle spectral properties in the transverse field Ising model by continuous unitary transformations

机译：连续unit变换在横向场伊辛模型中的多粒子光谱性质

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摘要

The one-dimensional transverse field Ising model is solved by continuous unitary transformations in the high-field limit.A high accuracy is reached due to the closure of the relevant algebra of operators, which we call string operators.The closure is related to the possibility to map the model by Jordan-Wigner transformation to noninteracting fermions, but it is proven without referring to this mapping.The effective model derived by the continuous unitary transformations is used to compute the contributions of one, two, and three elementary excitations to the diagonal dynamic structure factors.The three-particle contributions have, so far, not been addressed analytically, except close to the quantum critical point.
机译：一维横向场Ising模型通过在高场范围内进行连续unit变换来求解，由于算子的相关代数的闭合（我们称其为字符串算子）达到了高精度，这种闭合与可能性有关用约旦-维格纳变换将模型映射到非相互作用的费米子上，但是没有参考这种映射就证明了。连续unit变换导出的有效模型用于计算对角线的一阶，二阶和三阶基本激发的贡献。到目前为止，除接近量子临界点外，尚未对三粒子的贡献进行分析。

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