Entanglement witnessing by arbitrarily many independent observers recycling a local quantum shared state

We investigate the scenario where an observer, Alice, shares a two-qubit state with arbitrary number of observers, Bobs, via sequentially and independently recycling qubit in possession first Bob. It is known that there exist entangled states which can be used to have arbitrarily long sequence Bobs who violate Clauser-Horne-Shimony-Holt (CHSH) Bell inequality single Alice. show do not whose entanglement detected by suitably choosing witness operator unsharp measurement settings Bobs. This proves set larger than those sequential violation local realism. There exist, therefore, two-party quantum correlations are "classical", but "nonclassicality" witnessed large observers at one end shared observer other end.