| Abstract: |
In general relativity, the gravitational field generated by a spinning body causes immersed test bodies to co-rotate with the central body, which is also known as the frame-dragging 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 two-body 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.
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