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arXiv 1909.01997quant-phhep-th
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三个耦合谐振子中的纠缠

Entanglement in Three Coupled Harmonic Oscillators

Abdeldjalil Merdaci, Ahmed Jellal

摘要:

本文发展了一种方法,在任意质量和耦合的坐标系中精确地求解包含一般二次相互作用的三体振子问题。我们引入了一个酉变换的三个独立的角度结束了对角化的哈密顿量。利用群$SU(3)$的表示理论,我们明确地确定了能谱的解。在考虑基态和约化密度矩阵的情况下,我们得到了相应的纯度函数,在适当的条件下,该纯度函数可以产生最小和最大的纠缠.讨论了实现三个变量中的一个变量的情况,恢复了文献中的已知结果。

英文摘要:

We develop an approach in solving exactly the problem of three-body oscillators including general quadratic interactions in the coordinates for arbitrary masses and couplings. We introduce a unitary transformation of three independent angles to end up with a diagonalized Hamiltonian. Using the representation theory of the group $SU(3)$, we explicitly determine the solutions of the energy spectrum. Considering the ground state together with reduced density matrix, we derive the corresponding purity function that is giving rise to minimal and maximal entanglement under suitable conditions. The cases of realizing one variable among three is discussed and know results in literature are recovered.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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