Abstract
We study the properties of the Nambu - Goto string populated by a set of self-interacting scalar fields. The contributions to the static quark - antiquark potential coming from the string, fields and string - field interactions are obtained in a two-loop calculation. For an infinitely-long string or massless scalar fields, the interaction between string and fields disappears. Also we observe that the energy of the system increases and the deconfinement radius (the value of R for which the potential vanishes) decreases as the value of the coupling parameter grows.
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