Abstract
Unification of gravity with quantum mechanics is still a terra incognita. Photon polarization measurements shed light in this quest, offering a unique perspective on the coexistence of these fundamental forces. We have revealed that non-reciprocity in the photon polarization angle can arise by tailoring the quantization axis, which corresponds to the direction of polarizer. Thanks to this non-reciprocity, the measured polarization angle along the quantization axis can become ten times larger than that of gravitationally induced frame rotation in both near-Earth and black hole environments. To verify this finding, we propose an astronomical interferometer composed of satellites with the tailored quantization axis, challenging the prevailing view of their triviality in closed paths of a photon. Notably, this non-reciprocity can extend to any additional rotation irrespective to the origin including non-relativistic rotation, quantum gravity, and the violation of Einstein equivalence principle. Our finding could offer new opportunities for testing fundamental principles in physics.