Department of Physics, Stanford University, Stanford, California 94305, USA.
Department of Physics, University of Nevada, Reno, Nevada 89557, USA.
Phys Rev Lett. 2013 Feb 15;110(7):071105. doi: 10.1103/PhysRevLett.110.071105. Epub 2013 Feb 14.
We propose a tunable resonant sensor to detect gravitational waves in the frequency range of 50-300 kHz using optically trapped and cooled dielectric microspheres or microdisks. The technique we describe can exceed the sensitivity of laser-based gravitational wave observatories in this frequency range, using an instrument of only a few percent of their size. Such a device extends the search volume for gravitational wave sources above 100 kHz by 1 to 3 orders of magnitude, and could detect monochromatic gravitational radiation from the annihilation of QCD axions in the cloud they form around stellar mass black holes within our galaxy due to the superradiance effect.
我们提出了一种可调谐谐振传感器，使用光学捕获和冷却的介电微球或微盘来检测频率范围在 50-300 kHz 的引力波。我们所描述的技术可以使用仅为激光引力波天文台大小的几百分之一的仪器，在该频率范围内超过其灵敏度。这种设备将引力波源的搜索体积扩展到 100 kHz 以上 1 到 3 个数量级，并可以通过超辐射效应探测到它们在我们星系中恒星质量黑洞周围形成的云团中来自 QCD 轴子湮灭的单色引力辐射。
