Asao Arai, Hiroyuki Kawano Enhanced Binding in a General Class of Quantum Field Models (88K, LaTex2.09) ABSTRACT. We consider, in an abstract form, a system of \lq\lq{quantum particles}" coupled to a Bose field. It is shown that, under suitable hypotheses, the composed system can have a ground state even if the uncoupled particle system has no ground state.