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arXiv 0907.3926cond-mat.mes-hallcond-mat.other
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纳米磁体与光子腔的强场相互作用

Strong-field interactions between a nanomagnet and a photonic cavity

Öney O. Soykal, M. E. Flatté

摘要:

我们分析了在完全量子力学处理中纳米磁体与微腔的单个光子模式的相互作用,发现可以实现非常大的量子相干磁-光子耦合。超过几个太赫兹的耦合项预计可以实现在一个球形腔的~1 mm半径与纳米磁体的~100 nm的半径和铁磁共振频率为~200 GHz。磁-光子系统的本征态对应于自旋取向和光子数的纠缠态,其中每个量子数的值都超过10^5;相反,具有确定自旋和光子数的初始(相干)态动态演化,以产生微波功率(和纳米磁体自旋取向)的大振荡,并且具有异常长的失相时间。

英文摘要:

We analyze the interaction of a nanomagnet with a single photonic mode of a microcavity in a fully quantum-mechanical treatment and find that exceptionally large quantum-coherent magnet-photon coupling can be achieved. Coupling terms in excess of several THz are predicted to be achievable in a spherical cavity of ~1 mm radius with a nanomagnet of ~100 nm radius and ferromagnetic resonance frequency of ~200 GHz. Eigenstates of the magnet-photon system correspond to entangled states of spin orientation and photon number, in which over 10^5 values of each quantum number are represented; conversely initial (coherent) states of definite spin and photon number evolve dynamically to produce large oscillations in the microwave power (and nanomagnet spin orientation), and are characterized by exceptionally long dephasing times.

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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