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首页> 外文期刊>Scientific reports. >Dissipation and resonance frequency shift of a resonator magnetically coupled to a semiclassical spin
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Dissipation and resonance frequency shift of a resonator magnetically coupled to a semiclassical spin

机译：谐振器磁耦合到半透明旋转的谐振器的耗散和共振频率

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摘要

We calculate the change of the properties of a resonator, when coupled to a semiclassical spin by means of the magnetic field. Starting with the Lagrangian of the complete system, we provide an analytical expression for the linear response function for the motion in the case of a mechanical resonator and the current for the case of an electromagnetic resonator, thereby considering the influence of the resonator on the spin and vice versa. This analysis shows that the resonance frequency and effective dissipation factor can change significantly due to the relaxation times of the spin. We first derive this for a system consisting of a spin and mechanical resonator and thereafter apply the same calculations to an electromagnetic resonator. Moreover, the applicability of the method is generalized to a resonator coupled to two-level systems and more, providing a key to understand some of the problems of two-level systems in quantum devices.
机译：当通过磁场耦合到半半来旋转时，计算谐振器的性能的变化。从完整系统的拉格朗日开始，我们为机械谐振器的情况和电磁谐振器的情况的情况下，为运动的线性响应函数提供分析表达，从而考虑谐振器对旋转的影响反之亦然。该分析表明，由于旋转的松弛时间，共振频率和有效耗散因子可以显着变化。我们首先推导出一种由旋转和机械谐振器组成的系统，然后对电磁谐振器应用相同的计算。此外，该方法的适用性推广到耦合到两级系统的谐振器，并且提供了一种了解量子设备中的两级系统的一些问题的关键。

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