论文标题
镁挤压增强的蛀牙磁机械的地面冷却
Magnon squeezing enhanced ground-state cooling in cavity magnomechanics
论文作者
论文摘要
蛀牙雄伟最近已成为研究宏观量子现象的新平台。大尺寸的铁磁体或铁磁体达到其基态的磁引诱振动模式代表了真正的宏观量子状态。在这里，我们研究了在腔雄伟系统中机械振动模式的基础冷却，并着重于镁挤压在提高冷却效率方面的作用。通过利用镁自我非线性来获得镁挤压。我们发现，镁挤压可以显着甚至完全抑制宏伟的斯托克斯散射。因此，它在实现未解决的侧带机制中实现地面冷却方面变得特别有用，在未解决的侧带机制中，常规的边带冷却方案效率低下。我们还发现，与微波炉的耦合仅在机械冷却中起不利影响。这本质上是两种模式宏伟的系统（不涉及微波腔）成为冷却机械运动的首选系统，在该系统中，通过均匀的偏置磁场和微波驱动场建立了磁通模式。
Cavity magnomechanics has recently become a new platform for studying macroscopic quantum phenomena. The magnetostriction induced vibration mode of a large-size ferromagnet or ferrimagnet reaching its ground state represents a genuine macroscopic quantum state. Here we study the ground-state cooling of the mechanical vibration mode in a cavity magnomechanical system, and focus on the role of magnon squeezing in improving the cooling efficiency. The magnon squeezing is obtained by exploiting the magnon self-Kerr nonlinearity. We find that the magnon squeezing can significantly and even completely suppress the magnomechanical Stokes scattering. It thus becomes particularly useful in realizing ground-state cooling in the unresolved-sideband regime, where the conventional sideband cooling protocols become inefficient. We also find that the coupling to the microwave cavity plays only an adverse effect in mechanical cooling. This makes essentially the two-mode magnomechanical system (without involving the microwave cavity) a preferred system for cooling the mechanical motion, in which the magnon mode is established by a uniform bias magnetic field and a microwave drive field.
