Affine group symmetries on the light ray, with dilations implementing modular flow, provide the minimal structure for thermality on the Rindler horizon via the Mellin transform bridge between Minkowski and Rindler modes.
Entanglement of the Vacuum between Left, Right, Future, and Past: The Origin of Entanglement-Induced Quantum Radiation
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abstract
The Minkowski vacuum state is expressed as an entangled state between the left and right Rindler wedges when it is constructed on the Rindler vacuum. In this paper, we further examine the entanglement structure and extend the expression to the future (expanding) and past (shrinking) Kasner spacetimes. This clarifies the origin of the quantum radiation produced by an Unruh--DeWitt detector in uniformly accelerated motion in the four-dimensional Minkowski spacetime. We also investigate the two-dimensional massless case where the quantum radiation vanishes but the same entanglement structure exists.
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Modular theory and affine representations on the Rindler horizon
Affine group symmetries on the light ray, with dilations implementing modular flow, provide the minimal structure for thermality on the Rindler horizon via the Mellin transform bridge between Minkowski and Rindler modes.