论文标题
木量量子相关温度计
Magnon-Phonon Quantum Correlation Thermometry
论文作者
论文摘要
大量的量子科学和技术需要低温环境，例如稀释冰箱提供的环境。在这些低温环境中，准确的温度计可能难以实施，昂贵，并且通常需要校准外部参考。在这里，我们从理论上提出了基于测量的混合系统的一级温度计，该混合系统由通过磁体阻滞性相互作用与镁质耦合的声子组成。温度计基于互相关测量，其中使用倒作驱动运动的光谱来扩展热机械运动，从而直接测量了声子温度与实验参数无关。结合一个简单的低温兼容微波腔读出，该主要温度计有望成为低于1 K的实验的流行温度计。
A large fraction of quantum science and technology requires low-temperature environments such as those afforded by dilution refrigerators. In these cryogenic environments, accurate thermometry can be difficult to implement, expensive, and often requires calibration to an external reference. Here, we theoretically propose a primary thermometer based on measurement of a hybrid system consisting of phonons coupled via a magnetostrictive interaction to magnons. Thermometry is based on a cross-correlation measurement in which the spectrum of back-action driven motion is used to scale the thermomechanical motion, providing a direct measurement of the phonon temperature independent of experimental parameters. Combined with a simple low-temperature compatible microwave cavity read-out, this primary thermometer is expected to become a popular thermometer for experiments below 1 K.
