论文标题
通过参数驱动诱导的长寿命模式，在腔镁中自旋电流的量子扩增
Quantum amplification of spin currents in cavity magnonics by a parametric drive induced long-lived mode
论文作者
论文摘要
腔介导的磁磁磁体耦合可以导致两个空间分离的磁性样品之间的自旋波激发转移。我们阐明将两光子参数驱动器应用于腔内的应用如何导致此转移效率的明显放大。腔体复发的多光子吸收打开了无限能量水平的无限梯子，这可以诱导镁质空间内的高阶转变。当相邻样品相干泵送时，这反映在一个磁性样品中的增强的自旋响应中。在稳定的动力区域内，参数驱动器引起的增强功能可能很高。具体而言，在稳定边界的外围附近，自旋电流被几个数量级扩大。这种引人注目的增强因子归因于参数诱导的强相干的出现。虽然在镁质上进行了上下文，但该原理的一般性将允许应用程序在参数腔中包含的系统之间的能量传递。
Cavity-mediated magnon-magnon coupling can lead to a transfer of spin-wave excitations between two spatially separated magnetic samples. We enunciate how the application of a two-photon parametric drive to the cavity can lead to stark amplification in this transfer efficiency. The recurrent multiphoton absorption by the cavity opens up an infinite ladder of accessible energy levels, which can induce higher-order transitions within the magnon Fock space. This is reflected in a heightened spin-current response from one of the magnetic samples when the neighboring sample is coherently pumped. The enhancement induced by the parametric drive can be considerably high within the stable dynamical region. Specifically, near the periphery of the stability boundary, the spin current is amplified by several orders of magnitude. Such striking enhancement factors are attributed to the emergence of parametrically induced strong coherences precipitated by a long-lived mode. While contextualized in magnonics, the generality of the principle would allow applications to energy transfer between systems contained in parametric cavities.
