Distance dependence of entanglement generation via a bosonic heat bath.
Distance dependence of entanglement generation via a bosonic heat bath.
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DOI：
10.1103/physrevlett.102.160501
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发表时间：
2008-12
影响因子：
8.6
通讯作者：
T. Zell;F. Queisser;R. Klesse
中科院分区：
文献类型：
--
作者：
T. Zell;F. Queisser;R. Klesse
在广义的 Caldeira-Leggett 模型中，我们分析了玻色子热浴可以以距离 r 纠缠两个微观量子系统的条件。我们发现可实现的纠缠对距离极其敏感。只有当系统处于系统-浴相互作用的截止波长 lambda 数量级的微观距离内时，才能实现显着的纠缠。在较大距离处，最大纠缠以 lambda 阶的衰减长度呈指数抑制。我们的结论是，通过热浴产生纠缠不适合纠缠远程物体。
Within a generalized Caldeira-Leggett model, we analyze the conditions under which a bosonic heat bath can entangle two microscopic quantum systems at a distance r. We find that the attainable entanglement is extremely distance-sensitive. Significant entanglement can only be achieved if the systems are within a microscopic distance that is of order of the cutoff wavelength lambda of the system-bath interaction. At larger distances, the maximal entanglement is exponentially suppressed with a decay length of order lambda. We conclude that entanglement generation via a heat bath is not suitable for entangling remote objects.