Hi everybody, For the ones interested by a hidden variable model of EPR state with a hidden communication channel , I recommend the last Cerf, Gisisn Massar and Popescu quant-ph/0410027 paper (4 pages – a short concise one). I think it is a good one (with the pointers it gives). It introduces a possible (logical) implementation of the EPR like state with what they call the non-local machines (PR- machines, I like the “machine” term they chosen rather than “interaction” :tongue2: ): We have another different look to the EPR like states (and the cost to represent them by "classical physics") . All the comments are welcome. Seratend.