The Bose-Einstein correlations from a Quantum Field Theory perspective

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Using a specific version of thermal Quantum Field Theory (QFT), supplemented by operator-field evolution of the Langevin type, we discuss two issues concerning the Bose Einstein correlations (BEC): the origin of different possible coherent behaviour of the emitting source and the origin of the observed shape of the BEC function C₂(Q). We demonstrate that previous conjectures in this matter obtained by other approaches are confirmed and have received complementary explanation.