12 citations · 12 across the 3 of their papers we have counts for
9 papers
Magnetic Catalysis and Fermion Mass Generation in de Sitter Spacetime
Kohei Fujikura, Toshifumi Noumi, Shintetsu Yamazaki
We consider the dynamics of a charged fermion in de Sitter space in the presence of a uniform background magnetic field, and discuss magnetic catalysis of chiral symmetry breaking…
Inflationary QCD phase diagram
Kohei Fujikura, Toshifumi Noumi
Motivated by the cosmological collider program, which aims to probe high-energy physics through inflation, we investigate the phase diagram of multi-flavor QCD in de Sitter spaceti…
Conformal Phase Transition in Supersymmetric QCD
Kohei Fujikura, Shota Nakagawa, Yuichiro Nakai +2
We construct a four-dimensional supersymmetric QCD in conformal window with a marginally relevant deformation which triggers the spontaneous breaking of (approximate) scale invaria…
Critical behavior of the Schwinger model via gauge-invariant VUMPS
Hirotsugu Fujii, Kohei Fujikura, Yoshio Kikukawa +2
We study the lattice Schwinger model by combining the variational uniform matrix product state (VUMPS) algorithm with a gauge-invariant matrix product ansatz that locally enforces…
Formation of defects associated with both spontaneous and explicit symmetry breaking
Kohei Fujikura, Mairi Sakellariadou, Michiru Uwabo-Niibo +1
We discuss formation of cosmic strings associated with a spontaneously broken approximate symmetry by performing classical field-theoretical simulations. An original …
Baryon Asymmetric Universe from Spontaneous CP Violation
Kohei Fujikura, Yuichiro Nakai, Ryosuke Sato +1
Spontaneous CP violation, such as the Nelson-Barr (NB) mechanism, is an attractive scenario for addressing the strong CP problem while realizing the observed phase of the Cabibbo-K…