Phase structure of the ghost model with higher-order gradient term
arXiv:1605.07836 · doi:10.1103/PhysRevD.94.065021
Abstract
The phase structure and the infrared behaviour of the Euclidean 3-dimensional symmetric ghost scalar field model with higher-order derivative term has been investigated in Wegner and Houghton's renormalization group framework. The symmetric phase in which no ghost condensation occurs and the phase with restored symmetry but with a transient presence of a ghost condensate have been identified. Finiteness of the correlation length at the phase boundary hints to a phase transition of first order. The results are compared with those for the ordinary symmetric scalar field model.
arXiv comment15 pages, 13 figures
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