Modular theory and affine representations on the Rindler horizon
The paper interprets the Unruh effect using modular theory and affine symmetry on a Rindler horizon. It shows that thermality arises from comparing two different spectral decompositions of modes: Minkowski modes adapted to translations and Rindler modes adapted to dilations. This non-unitary comparison yields the thermal factor, while modular flow describes this process via dilations on the half-line algebra.