4 papers · 1 filter
Real-time Gravitational Wave Response in Thermal Spinning fields
Atsuhisa Ota, Hui-Yu Zhu, Yuhang Zhu
We study how the spin content of the thermal plasmas affects the propagation of gravitational waves in a radiation-dominated universe. As a simple but representative setup, we cons…
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…
Mode analysis of Nambu-Goldstone modes in U(1) charged first-order relativistic viscous hydrodynamics
Atsuhisa Ota
We conduct a mode analysis of a general -charged first-order relativistic hydrodynamics within the framework of effective field theory for dissipative fluids in flat Minkowsk…
Fluctuation-dissipation relation in cosmic microwave background
Atsuhisa Ota
We study the fluctuation-dissipation relation for sound waves in the cosmic microwave background (CMB), employing effective field theory (EFT) for fluctuating hydrodynamics. Treati…