Real Space Renormalization Group Analysis of U(1)-Gauge Theory with theta-term in 2 Dimensions
HASSAN, Ahmed Sayed · IMACHI, Masahiro · YONEYAMA, Hiroshi
Original · EN
U(1) lattice gauge theory with θ-term is investigated by real space renormalization group approach. Flows of renormalized coupling constants are analyzed. For each θ, renormalization flows converge to a single trajectory irrespective of bare coupling constants of real action. For θ= π the system is in the confinement phase controlled by an infrared fixed point. We found a phase transition at θ= π. Imaginary part of the action given by θ-term stays fixed under renormalization group transformations leading to deconfinement.
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