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arXiv 1307.4571quant-phcond-mat.stat-mech
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扩展热环境诱导的高斯纠缠

Gaussian entanglement induced by an extended thermal environment

Antonio A. Valido, Daniel Alonso, Sigmund Kohler

摘要:

研究了偶极耦合到一维和三维玻色子环境中的三个谐振子之间的稳态纠缠。开放系统动力学的分析进行广义量子朗之万方程,我们解决了精确的傅立叶表示。重点在于高斯二部和三部纠缠诱导的高度非马尔可夫相互作用介导的环境。这种环境诱导的相互作用代表了一种有效的多方相互作用,具有空间长程功能:主要发现是被动振荡器的存在对稳态双模纠缠是有害的。此外,我们的研究结果强烈表明,环境引起的纠缠机制对应于不受控制的反馈,这主要是在低温下的相干和适度的振荡器环境耦合相比,振荡器频率。

英文摘要:

We study stationary entanglement among three harmonic oscillators which are dipole coupled to a one-dimensional or a three-dimensional bosonic environment. The analysis of the open-system dynamics is performed with generalized quantum Langevin equations which we solve exactly in Fourier representation. The focus lies on Gaussian bipartite and tripartite entanglement induced by the highly non-Markovian interaction mediated by the environment. This environment-induced interaction represents an effective many-parties interaction with a spatial long-range feature: a main finding is that the presence of a passive oscillator is detrimental for the stationary two-mode entanglement. Furthermore, our results strongly indicate that the environment-induced entanglement mechanism corresponds to uncontrolled feedback which is predominantly coherent at low temperatures and for moderate oscillator-environment coupling as compared to the oscillator frequency.

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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