各向异性(1/2,1)混合自旋海森堡链中的纠缠，纯度和保真度
Entanglement, purity, and fidelity in the anisotropy (1/2,1) mixed-spin system
我们研究了各向异性(1/2,1)混合自旋海森堡链中的纠缠，纯度和保真度，发现了在系统的SU(2)各向同性点，用来度量纠缠的负值度出现凹陷的特征，这不同自旋1/2 XXZ链中并发度的特征，后者在奇异点表现波峰的特征。进一步地，我们发现在各向同性点，纯度是最小值，而混态的保真率则是最大值。
We study entanglement, purity and fidelity in the anisotropy (1/2,1) mixed-spin Heisenberg chain. We find that negativity, as a measure of entanglement, displays a dip at the SU(2) isotropic point of the system, which is in contrast to the peak appearance of concurrence in the spin-1/2 XXZ chain. Moreover, at the isotropic point, purity gives a minimum, while the mixed-state fidelity susceptibility emerges a maximum.
孙哲、王晓光、熊恒娜
物理学
纠缠纯度保真度海森堡链
EntanglementPurityFidelityHeisenberg chain
孙哲,王晓光,熊恒娜.各向异性(1/2,1)混合自旋海森堡链中的纠缠，纯度和保真度[EB/OL].(2009-01-09)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/200901-409.点此复制
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