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gr-qc2025
Collective Properties of Gravitational Perturbations in Thermal Environments on a Dynamical Background
Atsuhisa Ota
A thermal plasma dresses soft gauge fields, turning them into collective modes with a plasmon gap and Landau damping. In this paper, we ask whether a thermal radiation plasma does…
hep-th2025
Graviton stimulated emission in squeezed vacuum states
Atsuhisa Ota, Yuhang Zhu
We study the dynamics of gravitons in a squeezed vacuum state under a thermal radiation background. Unlike traditional treatments that rely on the Boltzmann equation, we employ the…