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arXiv quant-ph/0403214quant-phcond-mat.mes-hall
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非相互作用电子气中电子自旋的纠缠

Entanglement of electron spins of non-interacting electron gases

Sangchul Oh, Jaewan Kim

摘要:

本文基于格林函数方法研究了多体系统中电子自旋的纠缠。作为应用,我们得到了非相互作用电子气的双粒子密度矩阵,并将其双自旋密度矩阵确定为Werner态。我们计算纠缠措施,一个经典的相关性,互信息,和一对分布函数的两个电子在零和有限的温度。我们发现在低温下纠缠度的变化与$T^2$成正比。

英文摘要:

We study entanglement of electron spins in many-body systems based on the Green's function approach. As an application we obtain the two-particle density matrix of a non-interacting electron gas and identify its two-spin density matrix as a Werner state. We calculate entanglement measures, a classical correlation, mutual information, and a pair distribution function of two electrons at zero and finite temperatures. We find that changes of entanglement measures are proportional to $T^2$ at low temperatures.

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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