AI 中文总结
研究近藤晶格模型量子相变中的多体纠缠，利用量子费舍尔信息，证明其与自旋分量相关的QFI可表征重准粒子破坏，通过分析模型阐明物理起源，并提议用中子散射测量检验结果，展示多体系统算符作用。
AI 中文摘要
奇异金属是高度集体化的量子多体系统的典型例子，需要新的表征手段，量子信息方法对此有很大贡献潜力。我们使用量子费舍尔信息（QFI）研究近藤晶格模型量子相变中的多体纠缠。我们表明，与序参量横向的自旋分量相关的QFI表征了近藤破坏的磁有序相中重准粒子的破坏情况。通过对反铁磁海森堡模型的分析阐明了这一观察结果的物理起源。我们建议在重费米子相图的有序部分通过非极化和极化非弹性中子散射测量来检验结果。我们的发现说明了多体系统的不同算符如何不仅能见证不同扇区的多体纠缠，还能阐明相图不同部分的整体物理情况。
英文摘要
Strange metals exemplify highly collective quantum many-body systems that call for new means of characterization, and there is considerable potential for quantum information approaches contributing to the cause. We investigate multipartite entanglement across the quantum phase transition of a Kondo lattice model using the quantum Fisher information (QFI). We show that the QFI associated with the spin components transverse to the order parameter characterizes the destruction of heavy quasiparticles in the Kondo-destroyed magnetic-ordered phase. The physical origin of this observation is elucidated through an analysis of the antiferromagnetic Heisenberg model. We propose to test the results in terms of both unpolarized and polarized inelastic neutron scattering measurements in the ordered part of the heavy fermion phase diagram. Our findings illustrate how different operators of a many-body system can be employed to not only witness multipartite entanglement in different sectors and but also elucidate the overall physics across different parts of the phase diagram.
Comments7+8 pages, 3+5 figures
