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Entangled mechanical oscillators

机译：纠缠机械振荡器

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摘要

Hallmarks of quantum mechanics include superposition and entanglement. In the context of large complex systems, these features should lead to situations as envisaged in the 'Schroedinger's cat" thought experiment (where the cat exists in a superposition of alive and dead states entangled with a radioactive nucleus). Such situations are not observed in nature. This may be simply due to our inability to sufficiently isolate the system of interest from the surrounding environment-a technical limitation. Another possibility is some as-yet-undiscovered mechanism that prevents the formation of macroscopic entangled states. Such a limitation might depend on the number of elementary constituents in the system or on the types of degrees of freedom that are entangled. Tests of the latter possibility have been made with photons, atoms and condensed matter devices. One system ubiquitous to nature where entanglement has not been previously demonstrated consists of distinct mechanical oscillators. Here we demonstrate deterministic entanglement of separated mechanical oscillators, consisting of the vibrational states of two pairs of atomic ions held in different locations. We also demonstrate entanglement of the internal states of an atomic ion with a distant mechanical oscillator. These results show quantum entanglement in a degree of freedom that pervades the classical world. Such experiments may lead to the generation of entangled states of larger-scale mechanical oscillators, and offer possibilities for testing non-locality with mesoscopic systems. In addition, the control developed here is an important ingredient for scaling-up quantum information processing with trapped atomic ions.
机译：量子力学的标志包括叠加和纠缠。在大型复杂系统的背景下，这些特征应导致“薛定inger的猫”思想实验所设想的情况（猫以活泼和死态与放射性核纠缠的状态存在）。这可能仅是由于我们无法将感兴趣的系统与周围环境充分隔离，这是技术上的局限性；另一种可能是尚未发现的机制，阻止了宏观纠缠态的形成。根据系统中基本元素的数量或被纠缠的自由度的类型，使用光子，原子和凝聚态物质装置对后一种可能性进行了测试，以前没有证明纠缠的一种普遍存在于自然界的系统由不同的机械振荡器组成，在这里我们证明了分离的机械振荡器的确定性纠缠闪烁器，由保存在不同位置的两对原子离子的振动状态组成。我们还演示了一个遥远的机械振荡器对原子离子内部状态的纠缠。这些结果表明量子纠缠在整个古典世界的自由度中。这样的实验可能导致大型机械振荡器的纠缠态的产生，并提供了用介观系统测试非局部性的可能性。此外，此处开发的控件是使用捕集的原子离子按比例放大量子信息处理的重要组成部分。

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  • 来源
    《Nature》 |2009年第7247期|683-685|共3页
  • 作者

    J. D. Jost; J.P.Home; J. M. Amini; D. Hanneke; R.Ozeri; C. Langer; J. J. Bollinger; D. Leibfried; D. J. Wineland;

  • 作者单位

    Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA;

    Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA;

    Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA;

    Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA;

    Department of Physics of Complex Systems, Weizmann institute of Science, Rehovot 76100, Israel;

    Lockheed Martin, Denver, Colorado 80127, USA;

    Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA;

    Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA;

    Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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