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222 papers · 1 filter
Dynamically assisted Klein tunneling in the Furry picture
Makoto Ochiai, Shunsuke Shibayama
One-dimensional scattering of a wave packet of a relativistic fermion under a temporally oscillating electric field superimposed on a potential step is discussed by using the Furry…
Soliton Resonances in Four Dimensional Wess-Zumino-Witten Model
Shangshuai Li, Masashi Hamanaka, Shan-Chi Huang +1
We present two kinds of resonance soliton solutions on the Ultrahyperbolic space for the G=U(2) Yang equation, which is equivalent to the anti-self-dual Yang-Mills (AS…
More on scattering processes of dressed particles with a time-dependent mass
Yusuke Yamada
We discuss the scattering process of a scalar field having a time-dependent mass with another scalar field having a constant mass as a toy model of the scattering problems during p…
Roles of electric field/time-dependent Wilson line in toroidal compactification with or without magnetic fluxes
Hiroyuki Abe, Yusuke Yamada
We discuss the effects of electric fields along compact directions within (supersymmetric) gauge theory in $\mathbb{R}^{1,3}\times{\mathbb T}^2 (\times{\mathbb T}^2\times{\mathbb T…
Proving the absence of large one-loop corrections to the power spectrum of curvature perturbations in transient ultra-slow-roll inflation within the path-integral approach
Ryodai Kawaguchi, Shinji Tsujikawa, Yusuke Yamada
We revisit one-loop corrections to the power spectrum of curvature perturbations in an inflationary scenario containing a transient ultra-slow-roll (USR) period. In Ref.[1], it…
Roles of boundary and equation-of-motion terms in cosmological correlation functions
Ryodai Kawaguchi, Shinji Tsujikawa, Yusuke Yamada
We revisit the properties of total time-derivative terms as well as terms proportional to the free equation of motion (EOM) in a Schwinger-Keldysh formalism. They are relevant to t…