44 citations · 231 across the 23 of their papers we have counts for
24 papers
Saddle-point approximation to the false vacuum decay at finite temperature in one-dimensional quantum mechanics
Koji Harada, Shuichiro Tao, Qiang Yin
We calculate the false-vacuum decay rate in one-dimensional quantum mechanics on the basis of the saddle-point approximation in the Euclidean path integral at finite temperature. T…
Numerical study of renormalization group flows of nuclear effective field theory without pions on a lattice
Koji Harada, Satoru Sasabe, Masanobu Yahiro
We formulate the next-to-leading order nuclear effective field theory without pions in the two-nucleon sector on a spatial lattice, and investigate nonperturbative renormalization…
Convergent perturbative nuclear effective field theory
Koji Harada, Hirofumi Kubo, Tatsuya Sakaeda +1
We consider the nuclear effective field theory including pions in the two-nucleon sector in the S waves up to including the next-to-next-to-leading order (NNLO) terms according to…
Wilsonian renormalization group analysis of nonrelativistic three-body systems without introducing dimerons
Koji Harada, Hirofumi Kubo, Issei Yoshimoto
Low-energy effective field theory describing a nonrelativistic three-body system is analyzed in the Wilsonian renormalization group (RG) method. No effective auxiliary field (dimer…
Pions are neither perturbative nor nonperturbative: Wilsonian renormalization group analysis of nuclear effective field theory including pions
Koji Harada, Hirofumi Kubo, Yuki Yamamoto
Pionful nuclear effective field theory (NEFT) in the two-nucleon sector is examined from the Wilsonian renormalization group point of view. The pion exchange is cut off at the floa…
Apparently noninvariant terms of nonlinear sigma model in the one-loop approximation
Koji Harada, Hirofumi Kubo, Yuki Yamamoto
We show how the Apparently Noninvariant Terms (ANTs), which emerge in perturbation theory of nonlinear sigma models, are consistent with the nonlinearly realized symmetry by employ…