Remarks on the tensor product structure of no-signaling theories
  In the quantum logic framework we show that the no-signaling box model is a particular type of tensor product of the logics of single boxes. Such notion of tensor product is too strong to apply in the category of logics of quantum mechanical systems. Consequently, we show that the no-signaling box models cannot be considered as generalizations of quantum mechanical models. 
Tomasz I. Tylec, Marek Ku\'s
quant-ph