Abstract: 
In general relativity, the gravitational field generated by a spinning body causes immersed test bodies to corotate with the central body, which is also known as the framedragging effect. One manifestation of this effect is known as the gravitational Faraday rotation, where the polarisation direction of a linearly polarised electromagnetic/gravitational wave rotates due to the background gravitomagnetic field when passing by a spinning body. How the effect can be computed using quantum field theory scattering amplitudes, how the calculation connects with the gravitational twobody problem with spin relevant for gravitational wave physics, and what the calculations tell us about universal predictions of quantum gravity in the infrared, will be discussed.
