论文标题
重力波模拟黑洞时空中的自旋进动
Spin precession in the gravity wave analogue black hole spacetime
论文作者
论文摘要
据预测，固定陀螺仪的自旋进动频率在轨道缩小的情况下显示出强力状态中的各种异常，最终其进液频率变得任意高，非常接近旋转黑洞的地平线。考虑到浅盆地中流动流体的重力波，充当旋转的模拟黑洞，人们可以观察到预测的强力效应对实验室的自旋进动的强力效应。将螺纹与浮力颗粒一起连接并用短长度的微型链将其固定在流体容器的底部，可以构造一个简单的局部测试陀螺仪，以测量重力波模拟黑洞附近的旋转进液频率。该线充当陀螺仪的轴。通过调节测试陀螺仪的轨道频率，也可以通过这种实验设置（如特殊情况）来测量强力透镜刺激效应和测量/脱水效应。例如，为了测量刺激效应，可以将微型链的长度设置为零，从而使陀螺仪变为静态。一个人还可以通过在未旋转的类似黑洞周围绕过所谓的开普勒频率的测试陀螺仪来测量该系统的大地进动，该测试陀螺仪与径向速度相比，可以通过使流体/涡流的旋转可忽略不计来构建。
It was predicted that the spin precession frequency of a stationary gyroscope shows various anomalies in the strong gravity regime if its orbit shrinks, and eventually its precession frequency becomes arbitrarily high very close to the horizon of a rotating black hole. Considering the gravity waves of a flowing fluid with vortex in a shallow basin, that acts as a rotating analogue black hole, one can observe the predicted strong gravity effect on the spin precession in the laboratory. Attaching a thread with the buoyant particles and anchored it to the bottom of the fluid container with a short length of miniature chain, one can construct a simple local test gyroscope to measure the spin precession frequency in the vicinity of the gravity wave analogue black hole. The thread acts as the axis of the gyroscope. By regulating the orbital frequency of the test gyroscope, one can also be able to measure the strong gravity Lense-Thirring effect and geodetic/de-Sitter effect with this experimental set-up, as the special cases. For example, to measure the Lense-Thirring effect, the length of the miniature chain can be set to zero, so that the gyroscope becomes static. One can also measure the geodetic precession with this system by orbiting the test gyroscope in the so-called Keplerian frequency around the non-rotating analogue black hole that can be constructed by making the rotation of the fluid/vortex negligible compared to its radial velocity.
