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arXiv 1507.02791quant-phcond-mat.mes-hall
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磁振子暗模和梯度记忆

Magnon dark modes and gradient memory

Xufeng Zhang, Chang-Ling Zou, Na Zhu, Florian Marquardt, Liang Jiang, Hong X. Tang

摘要:

为了克服超导电路的相干时间短的缺点,人们在发展混合量子系统方面做了大量的努力,引入了自然长寿命的自旋自由度。在所有可能的材料中,单晶钇铁石榴石最近已经显示出作为混合系统的有希望的候选者,并且已经证明了各种高度相干的相互作用,包括强耦合甚至超强耦合。这些系统的一个明显优点是自旋是以明确定义的磁振子模式的形式,这允许灵活和精确的调谐。在这里,我们表明,通过耗散工程,可以实现一个非马尔可夫的磁振子和微波腔光子之间的相互作用动力学。这样的过程使我们能够建立一个磁振子梯度存储器存储信息的磁振子暗模式,从微波腔去耦,从而保持长的寿命。我们的发现为开发长寿命、多模量子存储器提供了一种有前途的方法。

英文摘要:

Extensive efforts have been expended in developing hybrid quantum systems to overcome the short coherence time of superconducting circuits by introducing the naturally long-lived spin degree of freedom. Among all the possible materials, single-crystal yttrium iron garnet has shown up very recently as a promising candidate for hybrid systems, and various highly coherent interactions, including strong and even ultra-strong coupling, have been demonstrated. One distinct advantage of these systems is that the spins are in the form of well-defined magnon modes, which allows flexible and precise tuning. Here we demonstrate that by dissipation engineering, a non-Markovian interaction dynamics between the magnon and the microwave cavity photon can be achieved. Such a process enables us to build a magnon gradient memory to store information in the magnon dark modes, which decouple from the microwave cavity and thus preserve a long life-time. Our findings provide a promising approach for developing long-lifetime, multimode quantum memories.

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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