A method to provide entangled photon pairs comprising the steps of: I) generation of entangled photon pairs in an entangled photon source by pumping a nonlinear crystal with a pump laser for parametric down-conversion, in particular spontaneous parametric down-conversion, - whereas each entangled photon pair consist of two photons entangled in polarization and/or frequency and/or time, and whereby the two photons of each entangled photon pair are correlated in their spatial mode profile, II) space-division de-multiplexing the photons of the entangled photon pairs with a coupling means , in order to separate the entangled photon pairs and in order to separate the two photons of an entangled photon pair, - whereas the coupling means assign by space-division de-multiplexing each photon of an entangled photon pair to a separate optical interface , - whereas the coupling means assign by space-division de-multiplexing each photon pair to a pair of optical interfaces - whereas the pair of optical interfaces for an entangled photon pair forms a transmission channel between two receivers, III) distribution of photons of the entangled photon pairs with at least four separate optical interfaces in order to transmit the photons to at least two receivers, - whereas at least two transmission channels are formed between at least two receivers. I) generation of entangled photon pairs in an entangled photon source by pumping a nonlinear crystal with a pump laser for parametric down-conversion, in particular spontaneous parametric down-conversion, - whereas each entangled photon pair consist of two photons entangled in polarization and/or frequency and/or time, and whereby the two photons of each entangled photon pair are correlated in their spatial mode profile, - whereas each entangled photon pair consist of two photons entangled in polarization and/or frequency and/or time, and whereby the two photons of each entangled photon pair are correlated in their spatial mode profile, II) space-division de-multiplexing the photons of the entangled photon pairs with a coupling means , in order to separate the entangled photon pairs and in order to separate the two photons of an entangled photon pair, - whereas the coupling means assign by space-division de-multiplexing each photon of an entangled photon pair to a separate optical interface , - whereas the coupling means assign by space-division de-multiplexing each photon pair to a pair of optical interfaces - whereas the pair of optical interfaces for an entangled photon pair forms a transmission channel between two receivers, - whereas the coupling means assign by space-division de-multiplexing each photon of an entangled photon pair to a separate optical interface , - whereas the coupling means assign by space-division de-multiplexing each photon pair to a pair of optical interfaces - whereas the pair of optical interfaces for an entangled photon pair forms a transmission channel between two receivers, III) distribution of photons of the entangled photon pairs with at least four separate optical interfaces in order to transmit the photons to at least two receivers, - whereas at least two transmission channels are formed between at least two receivers. - whereas at least two transmission channels are formed between at least two receivers. <EOS>