Topologically unquenched QCD: Prospects from an explorative study in two-flavor two-dimensional QED - art. no. 054502

The concept of simulating a variant of QCD with sea quarks which interact w ith the gluon configuration only via global gluonic quantities such as inte gral F (F) over tilde dx and integral FFdx is tested for the case of the ma ssive 2-flavor Schwinger model. It is found to amount to an importance samp ling method which generates-at essentially the costs of a quenched run-an e nsemble in between a full and a quenched one, thus providing a competitive alternative to the quenched approximation.