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We investigate about the existence of static solitons solutions in theinverse G-L free energy in phase transitions of {\phi}4 theory. We calculateall the characteristics of these solitons , like localized structure, finiteenergy and mass . We show that solitons appears in spontaneous symmetrybreaking (SSB) phenomenon only if the critical point is in excited state. Whenthe time is introduced we shown that the static solitons of SSB remain assolitons in Minkowski space-time while the static solitons of inverse G-L freeenergy converted to instantons in Euclidean space. The violation of causalitywhich appears in the tachyonic field could be faced passing from Minkowskisolitons to Euclidean instantons.

Solitons and Instantons in the inverse {\phi}4 theory of critical phenomena. A proposal for the violation of causality of tachyonic field