Correlation between entanglement and spin density in nitrogen-vacancy center of diamond
Correlation between entanglement and spin density in nitrogen-vacancy center of diamond
复制标题
金刚石氮空位中心纠缠与自旋密度的相关性
DOI：
10.1140/epjd/e2011-20335-5
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发表时间：
2011
影响因子：
1.8
通讯作者：
Y.)
中科院分区：
文献类型：
--
作者：
Babamoradi;M (Babamoradi;M.); Saani;MH (Saani;M.Heidari); Ranjbar;A (Ranjbar;A.); Vesaghi;MA (Vesaghi;M.A.); Kawazoe;Y (Kawazoe;Y.)
利用多体波函数计算了金刚石中中性和负电荷氮空位（NV）中心的von Neumann熵。利用完全考虑e-e相互作用项的广义哈伯德哈密顿量计算了基态和激发态的多电子波函数。给出了纠缠度与NV相邻原子上分布的自旋密度之间的关系。在所有研究的基态和激发态中，自旋密度和纠缠在相邻原子弛豫下的行为是相同的。结果表明，自旋密度可以用来量化纠缠，反之亦然。
Many-body wavefunctions were utilized to calculate von Neumann’s entropy as an entanglement measurement for neutral and negatively charged nitrogen vacancy (NV) centers in diamond. A generalized Hubbard Hamiltonian which considers e-e interaction terms completely was used to calculate many-electron wavefunctions of the ground and excited states. Correlation between entanglement and spin density distributed on neighboring atoms of NV is presented. The behavior of spin density and entanglement under relaxations of neighboring atoms is the same for all investigated ground and excited states. The results suggest that the spin density may be used to quantify the entanglemnt and vice versa.