The $\theta$-term, CP${}^{N-1}$ Model and the Inversion Approach in the Imaginary $\theta$ Method

Masahiro Imachi, Hitoshi Kambayashi, Yasuhiko Shinno +1

The weak coupling region of CP${}^{N-1}$ lattice field theory with the $\theta$-term is investigated. Both the usual real theta method and the imaginary theta method are studied. The latt…