Abstract
In this paper we investigate the vacuum condensate for the PT-symmetric and non-Hermitian (− gφ4) field theoretic model by using the Oscillator Representation method. The results are extended, in the quasi-particle effective theory, to include the investigation of the effective potential, perturbatively, up to g3. Our results reproduce the previous results about the exponential vanishing of the vacuum condensate as g → 0+. The reality of the vacuum energy is also confirmed.
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