4 papers
Stability and quasi-normal ringing in analogue black-white holes in SNAIL-based traveling-wave parametric amplifiers
Daisuke Yamauchi, Haruna Katayama, Norihiro Tanahashi
The circuit dynamics constructed by traveling-wave parametric amplifiers (TWPA), using superconducting nonlinear asymmetric elements (SNAILs), are known to be approximately describ…
Tensor clustering fossils in modified gravity and high-redshift gravitational-wave sound speed
Daisuke Yamauchi
We investigate the tensor clustering fossils as a possible probe to constrain the theory of gravity, in particular the deviation of the sound speed of gravitational waves from the…
Axion Cloud Decay due to the Axion-photon Conversion with Multi-pole Background Magnetic Fields
Yusuke Sakurai, Chul-Moon Yoo, Atsushi Naruko +1
We consider axion cloud decay due to the axion-photon conversion with multi-pole background magnetic fields. We focus on the and mode for the axion field configura…
Dynamical simulations of colliding superconducting strings
Takashi Hiramatsu, Marc Lilley, Daisuke Yamauchi
We study the collisions of elastic superconducting strings, also referred to as current-carrying strings, formed in a field-theory model…