采用具有QND技术的刚性控制腔降低和可能消除涂层热噪声
Reduction and possible elimination of coating thermal noise using a rigidly controlled cavity with a QND technique
摘要：
镜面热噪声是高精度测量中的重要问题之一，如引力波探测、冷阻尼实验等。本文指出，多层膜反射镜的热噪声可以通过机械分离膜层来降低。在本文中，我们介绍了一种通过锁定机械分离镜来进一步降低热噪声的方法。这种减少受到控制噪声的标准量子极限的限制，但它可以用量子非破坏技术来克服，这最终提高了完全消除涂层热噪声的可能性。
英文摘要：
Thermal noise of a mirror is one of the most important issues in high precision measurements such as gravitational-wave detection or cold damping experiments. It has been pointed out that thermal noise of a mirror with multi-layer coatings can be reduced by mechanical separation of the layers. In this paper, we introduce a way to further reduce thermal noise by locking the mechanically separated mirrors. The reduction is limited by the standard quantum limit of control noise, but it can be overcome with a quantum-non-demolition technique, which finally raises a possibility of complete elimination of coating thermal noise.
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